playbin: properties to retrieve current track always returns -1
In playback the current-video, current-audio and current-text properties are not working anymore, the returned value is always -1. Since gstreamer!485 (merged), the playbin->current_video
, playbin->current_audio
and playbin->current_text
variables are not set anymore, meaning combiner_active_pad_changed()
is not called as before.