Prevent phantom calls to queue members.

If a caller were to hang up while a periodic announcement or position
were being said, the return value for those functions would incorrectly
indicate that the caller was still in the queue. With these changes,
the problem does not occur.

(closes issue #14631)
Reported by: latinsud
Patches:
      queue_announce_ghost_call2.diff uploaded by latinsud (license 745)
	  (with small modification from me)



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@205349 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_queue.c

@@ -1648,7 +1648,8 @@ posout:
 	res = play_file(qe->chan, qe->parent->sound_thanks);
 
 playout:
-	if ((res > 0 && !valid_exit(qe, res)) || res < 0)
+
+	if ((res > 0 && !valid_exit(qe, res)))
 		res = 0;
 
 	/* Set our last_pos indicators */
@@ -2123,7 +2124,7 @@ static int say_periodic_announcement(struct queue_ent *qe)
 	/* play the announcement */
 	res = play_file(qe->chan, qe->parent->sound_periodicannounce[qe->last_periodic_announce_sound]);
 
-	if ((res > 0 && !valid_exit(qe, res)) || res < 0)
+	if (res > 0 && !valid_exit(qe, res))
 		res = 0;
 
 	/* Resume Music on Hold if the caller is going to stay in the queue */