First multipatch - this fixes all compile warnings on gcc4,

but there is one thing that needs to be done - fix 0verkill
for amd64.

avi.c

@@ -13,9 +13,9 @@
 int TRI_D_ON=0;
 int tri_d=0;
 
-unsigned char line[16384];
+char line[16384];
 /* For loading lines from ASCII files */
-unsigned char *lptr;
+char *lptr;
 /* Used in conjunction with "line" variable */
 unsigned char *pos=DUMMY;
 /* Pointer to a cube of chars containing all the positions of the avi animation
@@ -55,13 +55,13 @@ int last_color, last_char;
 
 void load_line(void)
 {
-	again:
-	lptr=line;
-	if (!(fgets(line,sizeof(line),f))){
+	do {
+	    lptr=line;
+	    if (!(fgets(line,sizeof(line),f))){
 		*line=0;
 		return;
-	}
-	if (*lptr=='#') goto again;
+	    }
+	} while (*lptr != '#');
 }
 
 int read_number(void)
@@ -177,7 +177,7 @@ void put_attribute(int x,int y,int pos, int chr)
 	ptr[1]=chr;
 }
 
-void load_avi(unsigned char *filename)
+void load_avi(char *filename)
 {
 	int xoffset=0, yoffset=-1,pos=-1,x;
 
@@ -248,7 +248,7 @@ void normalize_transparency(void)
 
 }
 
-void save_avi(unsigned char *filename)
+void save_avi(char *filename)
 {
 	int pos,y,x,t;
 	unsigned char *char_pointer,*attr_pointer;
@@ -377,7 +377,7 @@ int get_colour(void){
 void print_bottom_line(void)
 {
 	int offs=SCREEN_X*(SCREEN_Y-2);
-	unsigned char txt[32];
+	char txt[32];
 	int x;
 
 	memset(screen_a+offs,7,SCREEN_X);

bot.c

@@ -116,7 +116,7 @@ struct  /* keyboard status */
 }keyboard_status;
 
 
-unsigned char *names[N_NAMES]={
+char *names[N_NAMES]={
 	"Terminator",
 	"Jack The Ripper",
 	"Rambo",
@@ -140,7 +140,7 @@ unsigned char *names[N_NAMES]={
 int direction=0;  /* 0=stop, 1=left, 2=right */
 int const1,const2,const3,const4;
 unsigned short port=DEFAULT_PORT;
-unsigned char *host;
+char *host;
 int priority;   
 /* 	0=nothing
  *	1=kill player
@@ -245,7 +245,7 @@ void send_quit(void)
 
 
 /* initiate connection with server */
-char * contact_server(int color,unsigned char *name)
+char * contact_server(int color, char *name)
 {
 	static unsigned char packet[256];
 	int l=strlen(name)+1;
@@ -491,8 +491,8 @@ void clean_memory(void)
 
 void change_level(void)
 {
-	unsigned char *LEVEL;
-	unsigned char txt[256];
+	char *LEVEL;
+	char txt[256];
 
 	clean_memory();
 	free_sprites(level_sprites_start);
@@ -856,13 +856,13 @@ int process_packet(unsigned char *packet,int l)
 
 		case P_MESSAGE:
 		if (l<2)break;   /* invalid packet */
-		n=2+strlen(packet+1);
+		n=2+strlen((char *)packet+1);
 		break;
 
 		case P_END:
 		if (l<2)printf("Game terminated.\n");
 		else printf("Game terminated by %s.\n",packet+1);
-		n=2+strlen(packet+1);
+		n=2+strlen((char *)packet+1);
 		shut_down(1);
 
 		case P_INFO:
@@ -871,7 +871,7 @@ int process_packet(unsigned char *packet,int l)
 		for (a=0;a<packet[5]&&a<TOP_PLAYERS_N;a++)
 		{
 			int x;
-			x=strlen(packet+l+9)+1;
+			x=strlen((char *)packet+l+9)+1;
 			l+=x+9;
 		}
 		n=l;
@@ -916,17 +916,17 @@ int process_packet(unsigned char *packet,int l)
 
 		case P_CHANGE_LEVEL:
 		{
-			unsigned char *md5;
+			char *md5;
 			int a;
-			char p;
+			unsigned char p;
 
 			if (l<38)break;   /* invalid packet */
 			a=get_int(packet+1);
 			if (level_number==a)goto level_changed;
 			level_number=a;
 
 			md5=md5_level(level_number);
-			if (strcmp(md5,packet+5))   /* MD5s differ */
+			if (strcmp((char *)md5,(char *)packet+5))   /* MD5s differ */
 			{
 				mem_free(md5);
 				ERROR("Invalid MD5 sum. Can't change level. Exiting...");
@@ -1038,7 +1038,7 @@ void parse_command_line(int argc,char **argv)
 }
 
 
-unsigned char * select_name(void)
+char * select_name(void)
 {
 	return names[(random())%N_NAMES];
 }
@@ -1072,7 +1072,7 @@ int main(int argc,char **argv)
 {
 	int color;
 	unsigned long_long last_time;
-	unsigned char *m;
+	char *m;
 
 
 #ifdef WIN32

client.c

@@ -136,7 +136,7 @@ struct msgline_type
 }msg_line[N_MESSAGES];
 
 int last_message;
-unsigned char error_message[1024];
+char error_message[1024];
 
 unsigned char set_size;  /* -s option was on the command line */
 
@@ -188,7 +188,7 @@ void load_cfg(char *host,char *name,int *color)
 {
 	FILE *stream;
 	int a;
-	unsigned char txt[256];
+	char txt[256];
 
 #ifndef WIN32
 	sprintf(txt,"%s/%s",getenv("HOME"),CFG_FILE);
@@ -220,7 +220,7 @@ void load_cfg(char *host,char *name,int *color)
 void save_cfg(char *host,char *name,int color)
 {
 	FILE *stream;
-	unsigned char txt[256];
+	char txt[256];
 
 #ifndef WIN32
 	sprintf(txt,"%s/%s",getenv("HOME"),CFG_FILE);
@@ -381,7 +381,7 @@ void send_quit(void)
 
 
 /* initiate connection with server */
-char * contact_server(int color,unsigned char *name)
+char * contact_server(int color,char *name)
 {
 	static unsigned char packet[256];
 	int l=strlen(name)+1;
@@ -910,8 +910,8 @@ void draw_scene(void)
 
 void change_level(void)
 {
-	unsigned char *LEVEL;
-	unsigned char txt[256];
+	char *LEVEL;
+	char txt[256];
 
 	clean_memory();
 	free_sprites(level_sprites_start);
@@ -1161,32 +1161,39 @@ int process_packet(unsigned char *packet,int l)
 
 		case P_MESSAGE:
 		if (l<2)break;   /* invalid packet */
-		add_message(packet+1);
-		n=2+strlen(packet+1);
+		add_message((char *)packet+1);
+		n=2+strlen((char *)packet+1);
 		break;
 
 		case P_CHANGE_LEVEL:
 		{
-			unsigned char txt[256];
-			unsigned char *name;
-			unsigned char *md5;
+			char txt[256];
+			char *name;
+			char *md5;
 			int a;
-			char p;
+			unsigned char p;
 
 			if (l<38)break;   /* invalid packet */
 			a=get_int(packet+1);
 			if (level_number==a)goto level_changed;
 			level_number=a;
-			snprintf(txt,256, "Trying to change level to number %d",level_number);
+			snprintf(txt,256, "Trying to change level to number %d",
+				level_number);
 			add_message(txt);
 			name=load_level(level_number);
-			if (!name){snprintf(error_message,1024,"Cannot find level number %d. Game terminated. Press ENTER.", level_number);send_quit();return -1;}
+			if (!name) {
+				snprintf(error_message,1024,"Cannot find level "
+					"number %d. Game terminated. Press ENTER.",
+					level_number);
+				send_quit();
+				return -1;
+			}
 			snprintf(txt,256,"Changing level to \"%s\"",name);
 			mem_free(name);
 			add_message(txt);
 
 			md5=md5_level(level_number);
-			if (strcmp(md5,packet+5))   /* MD5s differ */
+			if (strcmp((char *)md5,(char *)packet+5))   /* MD5s differ */
 			{
 				mem_free(md5);
 				snprintf(error_message,1024,"Invalid MD5 sum. Can't change level. Game terminated. Press ENTER.");
@@ -1226,7 +1233,7 @@ int process_packet(unsigned char *packet,int l)
 			top_players[a].frags=get_int(packet+l);
 			top_players[a].deaths=get_int(packet+l+4);
 			top_players[a].color=packet[l+8];
-			x=strlen(packet+l+9)+1;
+			x=strlen((char *)packet+l+9)+1;
 			memcpy(top_players[a].name,packet+l+9,x);
 			l+=x+9;
 		}
@@ -1508,7 +1515,7 @@ void menu_screen(char *host,char *name,unsigned short *p,int *color)
 	sprintf(txt,"hero%d",*color);
 	if (find_sprite(txt,&sprite))
 	{
-		unsigned char msg[256];
+		char msg[256];
 		mem_free(banner);
 		shut_down(0);
 		snprintf(msg,256,"Error: Can't find sprite \"%s\".\n",txt);
@@ -1997,7 +2004,7 @@ int main(int argc,char **argv)
 	char host[MAX_HOST_LEN+1];
 	char name[MAX_NAME_LEN+1];
 	int a;
-	unsigned char txt[256];
+	char txt[256];
 
 
 #ifdef WIN32
@@ -2039,7 +2046,10 @@ int main(int argc,char **argv)
 	for (a=0;a<N_SHRAPNELS;a++)
 	{
 		sprintf(txt,"shrapnel%d",a+1);
-		if (find_sprite(txt,&shrapnel_sprite[a])){fprintf(stderr,"Can't find sprite \"%s\".\n",txt);EXIT(1);}
+		if (find_sprite(txt,&shrapnel_sprite[a])) {
+			fprintf(stderr,"Can't find sprite \"%s\".\n",txt);
+			EXIT(1);
+		}
 	}
 
 	signal(SIGINT,signal_handler);

data.c

@@ -31,7 +31,7 @@ unsigned char *area_a;
 
 
 struct sprite *sprites=DUMMY;
-unsigned char **sprite_names=DUMMY;
+char **sprite_names=DUMMY;
 int n_sprites;  /* number of sprites */
 
 struct object_list *last_obj;
@@ -120,7 +120,7 @@ void _skip_ws(char **txt)
 /* find sprite according to its name */
 /* returns 1 on error */
 /* it's slow but not called in speed critical parts of the program */
-int find_sprite(unsigned char *name,int *num)
+int find_sprite(char *name,int *num)
 {
  for ((*num)=0;(*num)<n_sprites;(*num)++)
   if (!strcmp(sprite_names[*num],name))return 0;
@@ -185,7 +185,7 @@ int _convert_type(unsigned char c)
 
 
 /* load static data */
-void load_data(unsigned char * filename)
+void load_data(char * filename)
 {
  FILE * stream;
  static char line[1024];
@@ -234,7 +234,7 @@ void load_data(unsigned char * filename)
 
 
 /* load sprites */
-void load_sprites(unsigned char * filename)
+void load_sprites(char * filename)
 {
  FILE *stream;
  static char line[1024];
@@ -258,7 +258,7 @@ void load_sprites(unsigned char * filename)
   *p=0;p++;
   l=strlen(q);
   n_sprites++;
-  sprite_names=(unsigned char **)mem_realloc(sprite_names,n_sprites*sizeof(unsigned char*));
+  sprite_names=(char **)mem_realloc(sprite_names,n_sprites*sizeof(unsigned char*));
   if (!sprite_names){ERROR("Memory allocation error!\n");EXIT(1);}
   sprites=(struct sprite *)mem_realloc(sprites,n_sprites*sizeof(struct sprite));
   if (!sprites){ERROR("Memory allocation error!\n");EXIT(1);}
@@ -284,7 +284,7 @@ void free_sprites(int start_num)
 		free_sprite(sprites+a);
 	}
 	n_sprites=start_num;
-  	sprite_names=(unsigned char **)mem_realloc(sprite_names,n_sprites*sizeof(unsigned char*));
+  	sprite_names=(char **)mem_realloc(sprite_names,n_sprites*sizeof(unsigned char*));
 	if (!sprite_names){ERROR("Memory allocation error!\n");EXIT(1);}
 	sprites=mem_realloc(sprites,n_sprites*sizeof(struct sprite));
 	if (!sprites){ERROR("Memory allocation error!\n");EXIT(1);}
@@ -293,10 +293,10 @@ void free_sprites(int start_num)
 
 /* returns allocated string with level name or NULL on error */
 /* level_num is a line number in the LEVEL_FILE */
-unsigned char *load_level(int level_num)
+char *load_level(int level_num)
 {
-	unsigned char txt[1024];
-	unsigned char *retval;
+	char txt[1024];
+	char *retval;
 	int a;
 	FILE *f;
 
@@ -583,9 +583,10 @@ void update_position(struct it* obj,my_double new_x,my_double new_y,int width, i
 }
 
 
-unsigned char *__add_md5(unsigned char *filename, int *len, unsigned char**result)
+unsigned char *__add_md5(char *filename, int *len, unsigned char**result)
 {
-	unsigned char *p,*q;
+	unsigned char *p;
+	char *q;
 	int a;
 
 	q=MD5File(filename,NULL);
@@ -604,12 +605,12 @@ unsigned char *__add_md5(unsigned char *filename, int *len, unsigned char**resul
  * level_num is the line number in level.dat file
  * returns allocated string with the MD5 sum or NULL (on error)
  */
-unsigned char* md5_level(int level_num)
+char* md5_level(int level_num)
 {
 	unsigned char *result=0;
 	char *q;
 	int len=0;
-	unsigned char p[2048];
+	char p[2048];
 
 	q=load_level(level_num);
 	if (!q)return NULL;