$NetBSD: patch-ab,v 1.8 2009/07/31 08:50:27 drochner Exp $

--- plugins/audiocd/sj-metadata-musicbrainz3.c.orig	2009-07-23 20:24:18.000000000 +0200
+++ plugins/audiocd/sj-metadata-musicbrainz3.c
@@ -231,6 +231,8 @@ mb_list_albums (SjMetadata *metadata, ch
   }
 
   priv->disc = mb_read_disc (priv->cdrom);
+  if (!priv->disc)
+	return NULL;
   if (url != NULL) {
     mb_get_submission_url (priv->disc, NULL, 0, buffer, sizeof (buffer));
     *url = g_strdup (buffer);