[rygel] server: Set the album art uri when applying didl

[Jens Georg <jensgeorg src gnome org>]

commit 1c4ed3fe76a55fdd3ac75163cf5e02bb15b090c6
Author: Richard Röjfors <richard rojfors gmail com>
Date:   Sat Oct 24 14:21:18 2015 +0200

    server: Set the album art uri when applying didl
    
    Currently if an object is created in a writable container the
    album art uri is thrown away.
    This commit makes sure to create a thumbnail in the music item
    and assign the album art URI from the DIDL, if one is provided.
    
    Signed-off-by: Richard Röjfors <richard puffinpack se>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=757056

 src/librygel-server/rygel-music-item.vala |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/src/librygel-server/rygel-music-item.vala b/src/librygel-server/rygel-music-item.vala
index d528db5..2d9a45e 100644
--- a/src/librygel-server/rygel-music-item.vala
+++ b/src/librygel-server/rygel-music-item.vala
@@ -87,8 +87,13 @@ public class Rygel.MusicItem : AudioItem {
         base.apply_didl_lite (didl_object);
 
         this.track_number = didl_object.track_number;
-        // TODO: Not sure about it.
-        //this.album_art.uri = didl_object.album_art
+
+        if (didl_object.album_art.length > 0) {
+            if (this.album_art == null)
+                this.album_art = new Thumbnail ();
+            this.album_art.uri = didl_object.album_art;
+        } else if (this.album_art != null)
+            this.album_art = null;
     }
 
     internal override DIDLLiteObject? serialize (Serializer serializer,