add artist links on song page

MediaBrowser.Server.Implementations/ScheduledTasks/AudioImagesTask.cs

@@ -102,7 +102,9 @@ namespace MediaBrowser.Server.Implementations.ScheduledTasks
 
                 var album = item.Parent as MusicAlbum;
 
-                var filename = album != null && string.IsNullOrEmpty(item.Album + album.DateModified.Ticks) ? (item.Id.ToString() + item.DateModified.Ticks) : item.Album;
+                var filename = item.Album ?? string.Empty;
+
+                filename += album == null ? item.Id.ToString() + item.DateModified.Ticks : album.Id.ToString() + album.DateModified.Ticks;
 
                 var path = ImageCache.GetResourcePath(filename + "_primary", ".jpg");