Fix a locking inversion in MixMonitor.

We need to unlock the audiohook before trying to lock
the channel, since the correct locking order is channel
then audiohook.



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/13@421882 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_mixmonitor.c

@@ -743,14 +743,15 @@ static void *mixmonitor_thread(void *obj)
 									"File: %s\r\n",
 									ast_channel_name(mixmonitor->autochan->chan),
 									mixmonitor->filename);
+
+	ast_audiohook_unlock(&mixmonitor->audiohook);
+
 	ast_channel_lock(mixmonitor->autochan->chan);
 	if (ast_test_flag(mixmonitor, MUXFLAG_BEEP_STOP)) {
 		ast_stream_and_wait(mixmonitor->autochan->chan, "beep", "");
 	}
 	ast_channel_unlock(mixmonitor->autochan->chan);
 
-	ast_audiohook_unlock(&mixmonitor->audiohook);
-
 	ast_autochan_destroy(mixmonitor->autochan);
 
 	/* Datastore cleanup.  close the filestream and wait for ds destruction */