Introducing #define npc constants

As proposed by AnnieRuru in http://hercules.ws/board/topic/4320-getserverdef/
They're input directly by the server, Haru's idea! (Thank you).
Also introducing the MAX_CHAT_USERS define as requested by AnnieRuru.

Signed-off-by: shennetsind <ind@henn.et>

src/map/chat.h

@@ -10,6 +10,8 @@
 struct map_session_data;
 struct chat_data;
 
+#define MAX_CHAT_USERS 20
+
 struct chat_data {
 	struct block_list bl;            // data for this map object
 	char title[CHATROOM_TITLE_SIZE]; // room title 
@@ -21,7 +23,7 @@ struct chat_data {
 	uint32 zeny;						 // required zeny to join
 	uint32 minLvl;					 // minimum base level to join
 	uint32 maxLvl;					 // maximum base level allowed to join
-	struct map_session_data* usersd[20];
+	struct map_session_data* usersd[MAX_CHAT_USERS];
 	struct block_list* owner;
 	char npc_event[EVENT_NAME_LENGTH];
 	/* isn't this a waste? there is a enormous overhead, wouldn't something like skill_blockpc_start be better here? [Ind] */

src/map/script.c

@@ -19063,6 +19063,17 @@ void script_label_add(int key, int pos) {
  **/
 void script_hardcoded_constants(void) {
 
+	/* server defines */
+	script->set_constant("PACKETVER",PACKETVER,false);
+	script->set_constant("MAX_LEVEL",MAX_LEVEL,false);
+	script->set_constant("MAX_STORAGE",MAX_STORAGE,false);
+	script->set_constant("MAX_GUILD_STORAGE",MAX_GUILD_STORAGE,false);
+	script->set_constant("MAX_CART",MAX_INVENTORY,false);
+	script->set_constant("MAX_INVENTORY",MAX_INVENTORY,false);
+	script->set_constant("MAX_ZENY",MAX_ZENY,false);
+	script->set_constant("MAX_BG_MEMBERS",MAX_BG_MEMBERS,false);
+	script->set_constant("MAX_CHAT_USERS",MAX_CHAT_USERS,false);
+
 	/* status options */
 	script->set_constant("Option_Nothing",OPTION_NOTHING,false);
 	script->set_constant("Option_Sight",OPTION_SIGHT,false);