Fix bug for empty playlists.
Fix bug for empty playlists.

andysan/jotify,andysan/jotify,tonyskn/jotify,torarnv/jotify,TTGhost/jotify,StigLau/jotify,TTGhost/jotify,moumar/jotify,Burgestrand/jotify,TTGhost/jotify,torarnv/jotify,jkwatson/jotify,nollbit/jotify,moumar/jotify,StigLau/jotify,nollbit/jotify,tonyskn/jotify,jkwatson/jotify