git-svn-id: https://svn.code.sf.net/p/rathena/svn/athena@102 54d463be-8e91-2dee-dedb-b68131a5f0ec

src/map/chat.c

@@ -82,6 +82,11 @@ int chat_joinchat(struct map_session_data *sd,int chatid,char* pass)
 		clif_joinchatfail(sd,1);
 		return 0;
 	}
+	if(chatid == sd->chatID) //Double Chat fix by Alex14, thx CHaNGeTe 
+	{
+		clif_joinchatfail(sd,1);
+		return 0;
+	}
 
 	cd->usersd[cd->users] = sd;
 	cd->users++;