Add type to metadata bundle to avoid updating previous song when it shouldn't

src/engine/gstenginepipeline.cpp

@@ -926,6 +926,7 @@ void GstEnginePipeline::TagMessageReceived(GstMessage *msg) {
   gst_message_parse_tag(msg, &taglist);
 
   Engine::SimpleMetaBundle bundle;
+  bundle.type = Engine::SimpleMetaBundle::Type_Current;
   bundle.url = original_url_;
   bundle.title = ParseStrTag(taglist, GST_TAG_TITLE);
   bundle.artist = ParseStrTag(taglist, GST_TAG_ARTIST);