Fix minor code issues

src/playlistparsers/xspfparser.cpp

@@ -43,6 +43,9 @@ XSPFParser::XSPFParser(CollectionBackendInterface *collection, QObject *parent)
     : XMLParser(collection, parent) {}
 
 SongList XSPFParser::Load(QIODevice *device, const QString &playlist_path, const QDir &dir) const {
+
+  Q_UNUSED(playlist_path);
+
   SongList ret;
 
   QXmlStreamReader reader(device);