Fix last.fm cover art

src/widgets/osd.cpp

@@ -89,7 +89,12 @@ void OSD::SongChanged(const Song &song) {
   waiting.summary = summary;
   waiting.message = message_parts.join(", ");
 
-  if (show_art_) {
+  if (show_art_ && !song.image().isNull()) {
+    // The song has embedded art, so use that
+    AlbumArtLoaded(waiting, song.image());
+  } else if (show_art_) {
+    // Load the art in a background thread (maybe from a remote server),
+    // AlbumArtLoaded gets called when it's ready.
     quint64 id = cover_loader_->Worker()->LoadImageAsync(
         song.art_automatic(), song.art_manual());
     waiting_for_album_art_.insert(id, waiting);