Plug a reference leak in app_queue when adding members dynamically.

(closes issue #17738)
Reported by: bobwienholt
Patches:
      issue17738.patch uploaded by bobwienholt (license 950)
Tested by: bobwienholt, seanbright


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@280160 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_queue.c

@@ -4518,6 +4518,7 @@ static int add_to_queue(const char *queuename, const char *interface, const char
 	}
 	ao2_unlock(q);
 	ao2_unlock(queues);
+	queue_t_unref(q, "Expiring temporary reference");
 
 	return res;
 }