If there are no members in a queue, then the loop where the datastore for detecting

duplicate dialed numbers will be skipped, meaning the datastore isn't created. This means
that when we try to free it, there's a crash. This stops that crash from occurring.

(closes issue #11499, reported by slavon, patched by eliel)



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@92202 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_queue.c

@@ -2663,8 +2663,10 @@ static int try_calling(struct queue_ent *qe, const char *options, char *announce
 	if (use_weight)
 		AST_LIST_UNLOCK(&queues);
 	lpeer = wait_for_answer(qe, outgoing, &to, &digit, numbusies, ast_test_flag(&(bridge_config.features_caller), AST_FEATURE_DISCONNECT), forwardsallowed);
-	ast_channel_datastore_remove(qe->chan, datastore);
-	ast_channel_datastore_free(datastore);
+	if (datastore) {
+		ast_channel_datastore_remove(qe->chan, datastore);
+		ast_channel_datastore_free(datastore);
+	}
 	ast_mutex_lock(&qe->parent->lock);
 	if (qe->parent->strategy == QUEUE_STRATEGY_RRMEMORY) {
 		store_next(qe, outgoing);