[sushi/gnome-3-4] cover-art: make sure not to call result_list_get_size() on NULL

[Cosimo Cecchi <cosimoc src gnome org>]

commit c70ef2c2bc7252799c33e2d89faabb853f15a2ed
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Wed Apr 11 13:10:45 2012 -0400

    cover-art: make sure not to call result_list_get_size() on NULL
    
    Just set results_len to zero in that case.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=669472

 src/libsushi/sushi-cover-art.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/libsushi/sushi-cover-art.c b/src/libsushi/sushi-cover-art.c
index 6e4fae4..0ab4259 100644
--- a/src/libsushi/sushi-cover-art.c
+++ b/src/libsushi/sushi-cover-art.c
@@ -216,7 +216,7 @@ fetch_uri_job (GIOSchedulerJob *sched_job,
   MbReleaseFilter filter;
   MbRelease release;
   MbResultList results;
-  gint results_len, idx;
+  gint results_len = 0, idx;
   gchar *retval = NULL;
 
   query = mb_query_new (NULL, NULL);
@@ -226,7 +226,9 @@ fetch_uri_job (GIOSchedulerJob *sched_job,
   filter = mb_release_filter_artist_name (filter, job->artist);
 
   results = mb_query_get_releases (query, filter);
-  results_len = mb_result_list_get_size (results);
+
+  if (results)
+    results_len = mb_result_list_get_size (results);
 
   for (idx = 0; idx < results_len; idx++) {
     gchar asin[255];