wrc: Allow building without debug support in the parser.

tools/wrc/wrc.c

@@ -166,7 +166,7 @@ int char_number = 1;		/* The current char pos within the line */
 char *cmdline;			/* The entire commandline */
 time_t now;			/* The time of start of wrc */
 
-int yy_flex_debug;
+int yydebug, yy_flex_debug;
 
 resource_t *resource_top;	/* The top of the parsed resources */