[rhythmbox] artdisplay: add missing method in musicbrainz cover art search (bug #633531)

[Jonathan Matthew <jmatthew src gnome org>]

commit e0980f6475a448940d2bf322ebbc7241aaeb7bf8
Author: Jonathan Matthew <jonathan d14n org>
Date:   Sun Oct 31 19:10:50 2010 +1000

    artdisplay: add missing method in musicbrainz cover art search (bug #633531)

 .../artdisplay/MusicBrainzCoverArtSearch.py        |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/plugins/artdisplay/artdisplay/MusicBrainzCoverArtSearch.py b/plugins/artdisplay/artdisplay/MusicBrainzCoverArtSearch.py
index 4583ee0..83faa36 100644
--- a/plugins/artdisplay/artdisplay/MusicBrainzCoverArtSearch.py
+++ b/plugins/artdisplay/artdisplay/MusicBrainzCoverArtSearch.py
@@ -98,6 +98,9 @@ class MusicBrainzCoverArtSearch (object):
 	def search_next (self):
 		return False
 
+	def get_result_meta (self, search_results):
+		return (None, None)
+
 	def get_result_pixbuf (self, search_results):
 		return None