Index: channels/chan_gtalk.c
===================================================================
--- channels/chan_gtalk.c	(revision 65964)
+++ channels/chan_gtalk.c	(working copy)
@@ -693,7 +693,9 @@
 
 	if (tmp) {
 		tmp->alreadygone = 1;
-		ast_queue_hangup(tmp->owner);
+		/* TODO: use proper locking ? */
+		if (tmp->owner)
+			ast_queue_hangup(tmp->owner);
 	} else
 		ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
 	gtalk_response(client, from, pak, NULL, NULL);