[gnome-music/wip/mschraal/albumartcache-check-gst-struct] albumartcache: Check if embedded info exists

[Marinus Schraal <mschraal src gnome org>]

commit b6405247c329537da68af2c5e6863cede98dc547
Author: Marinus Schraal <mschraal gnome org>
Date:   Tue Apr 21 23:06:52 2020 +0200

    albumartcache: Check if embedded info exists
    
    The embedded art extra info can in rare cases be None, this will result
    in a crash.
    
    Add a None check to fix this.

 gnomemusic/albumartcache.py | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gnomemusic/albumartcache.py b/gnomemusic/albumartcache.py
index 28b3526b..8f454275 100644
--- a/gnomemusic/albumartcache.py
+++ b/gnomemusic/albumartcache.py
@@ -472,6 +472,8 @@ class EmbeddedArt(GObject.GObject):
                 break
             index += 1
             struct = sample.get_info()
+            if struct is None:
+                break
             success, image_type = struct.get_enum(
                 'image-type', GstTag.TagImageType)
             if not success: