[evince] view: do not call get_thumbnail_frame when pixbuf is NULL.

[Jose Aliste <jaliste src gnome org>]

commit 35d75eac9c627fda24282e602562c064e394e5fe
Author: José Aliste <jaliste src gnome org>
Date:   Fri Nov 26 12:01:01 2010 -0300

    view: do not call get_thumbnail_frame when pixbuf is NULL.

 libview/ev-jobs.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/libview/ev-jobs.c b/libview/ev-jobs.c
index 561a0f9..ee58943 100644
--- a/libview/ev-jobs.c
+++ b/libview/ev-jobs.c
@@ -814,7 +814,8 @@ ev_job_thumbnail_run (EvJob *job)
 	g_object_unref (rc);
 	ev_document_doc_mutex_unlock ();
 
-	job_thumb->thumbnail = ev_document_misc_get_thumbnail_frame (-1, -1, pixbuf);
+	if (pixbuf)
+		job_thumb->thumbnail = ev_document_misc_get_thumbnail_frame (-1, -1, pixbuf);
 	g_object_unref (pixbuf);
 
 	ev_job_succeeded (job);