Fix in an issue in the call forwarding handling code that was causing crashes

on every call into a queue.  I'm not entirely sure about the logic in this part
of the code, so I want to look at it some more tomorrow.  However, this makes
it safe and keeps it from crashing.

(closes issue #11486, reported by adamg, patched by me)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@91675 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_queue.c

@@ -2605,8 +2605,9 @@ static int try_calling(struct queue_ent *qe, const char *options, char *announce
 			strcpy(di->interface, cur->interface);
 			AST_LIST_INSERT_TAIL(dialed_interfaces, di, list);
 		} else {
+			if (di)
+				ast_log(LOG_DEBUG, "Skipping dialing interface '%s' since it has already been dialed\n", di->interface);
 			AST_LIST_UNLOCK(dialed_interfaces);
-			ast_log(LOG_DEBUG, "Skipping dialing interface '%s' since it has already been dialed\n", di->interface);
 			free(tmp);
 			continue;
 		}