Formatting

src/playlist/playlistmanager.cpp

@@ -451,7 +451,7 @@ void PlaylistManager::SongsDiscovered(const SongList &songs) {
   for (const Song &song : songs) {
     for (const Data &data : playlists_) {
       PlaylistItemList items = data.p->collection_items_by_id(song.id());
-      for (PlaylistItemPtr &item : items) {
+      for (const PlaylistItemPtr item : items) {
         if (item->Metadata().directory_id() != song.directory_id()) continue;
         static_cast<CollectionPlaylistItem*>(item.get())->SetMetadata(song);
         data.p->ItemChanged(item);