fix inaccurate ack message to ChangeMonitor action (issue #6630)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@11561 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_monitor.c

@@ -535,7 +535,7 @@ static int change_monitor_action(struct mansession *s, struct message *m)
 		return 0;
 	}
 	ast_mutex_unlock(&c->lock);
-	astman_send_ack(s, m, "Stopped monitoring channel");
+	astman_send_ack(s, m, "Changed monitor filename");
 	return 0;
 }