Fix another scenario where depending on configuration the stream would not get read.

For custom commands we don't know whether the audio is coming from a stream or not
so we are going to have to read the data despite no channels.

(closes issue #14416)
Reported by: caspy


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@181659 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_musiconhold.c

@@ -557,7 +557,7 @@ static void *monmp3thread(void *data)
 			}
 			res = 8 * MOH_MS_INTERVAL;	/* 8 samples per millisecond */
 		}
-		if (strncasecmp(class->dir, "http://", 7) && AST_LIST_EMPTY(&class->members))
+		if ((strncasecmp(class->dir, "http://", 7) || !strcasecmp(class->dir, "nodir")) && AST_LIST_EMPTY(&class->members))
 			continue;
 		/* Read mp3 audio */
 		len = ast_codec_get_len(class->format, res);