Fixed chat_createnpcchat() not checking if a chatroom already exists, producing memleaks in certain situations (bugreport:2325).

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@13269 54d463be-8e91-2dee-dedb-b68131a5f0ec

src/map/chat.c

@@ -4,6 +4,7 @@
 #include "../common/cbasetypes.h"
 #include "../common/malloc.h"
 #include "../common/nullpo.h"
+#include "../common/showmsg.h"
 #include "../common/strlib.h"
 #include "atcommand.h" // msg_txt()
 #include "battle.h" // struct battle_config
@@ -293,6 +294,12 @@ int chat_createnpcchat(struct npc_data* nd, const char* title, int limit, bool p
 	struct chat_data* cd;
 	nullpo_retr(0, nd);
 
+	if( nd->chat_id )
+	{
+		ShowError("chat_createnpcchat: npc '%s' already has a chatroom, cannot create new one!\n", nd->exname);
+		return 0;
+	}
+
 	cd = chat_createchat(&nd->bl, title, "", limit, pub, trigger, ev);
 	if( cd )
 	{

src/map/clif.c

@@ -1328,9 +1328,10 @@ void clif_changemapserver(struct map_session_data* sd, unsigned short map_index,
 void clif_blown(struct block_list *bl)
 {
 //Aegis packets says fixpos, but it's unsure whether slide works better or not.
-//	return clif_fixpos(bl);
+//	clif_fixpos(bl);
 	clif_slide(bl, bl->x, bl->y);
 }
+
 /*==========================================
  *
  *------------------------------------------*/

src/map/script.c

@@ -8461,8 +8461,11 @@ BUILDIN_FUNC(waitingroom)
 		ev = script_getstr(st, 4);
 		trigger = limit;
 	}
-	if( (nd=(struct npc_data *)map_id2bl(st->oid)) != NULL )
+
+	nd = (struct npc_data *)map_id2bl(st->oid);
+	if( nd != NULL )
 		chat_createnpcchat(nd, title, limit, pub, trigger, ev);
+
 	return 0;
 }