check gtp command parameters + correct bug of michi defaults

debug.c

@@ -55,10 +55,10 @@ void print_marker(Position *pos, Mark *marker)
     print_pos(&pos2, stdout, 0);
 }
 
-char* debug(Game *game)
+char* debug(Game *game, char *command)
 // Analyse the subcommands of the gtp debug command
 {
-    char *command = strtok(NULL," \t\n"), *ret="";
+    char *ret="";
     char *known_commands = "\nblocks_OK\nenv8\nfix_atari\ngen_playout\n"
         "match_pat3\nmatch_pat\nplayout\nprint_mark\nsavepos\nsetpos\n"
         "to_play";
@@ -69,6 +69,9 @@ char* debug(Game *game)
     Point moves[BOARDSIZE];
     Position *pos = game->pos;
 
+    if (command == NULL)
+        return "Error - Missing parameters";
+
     if (strcmp(command, "setpos") == 0) {
         char *str = strtok(NULL, " \t\n");
         while (str != NULL) {

michi.h

@@ -80,7 +80,7 @@ Score  final_score(Game *game, Status block_status[MAX_BLOCKS],
                                           Status point_status[BOARDSIZE]);
 Point  genmove (Game *game, TreeNode *tree, int *owner_map, int *score_count);
 //-------------------------- Functions in debug.c -----------------------------
-char*  debug(Game *game);
+char*  debug(Game *game, char *command);
 //-------------------------- Functions in michi.c -----------------------------
 TreeNode* best_move(TreeNode *tree, TreeNode **except);
 void   collect_infos(TreeNode *tree, int n, TreeNode *best