songdb: fix lazy loader also for classes
songdb: fix lazy loader also for classes

kingsj/music-player,albertz/music-player,kingsj/music-player,albertz/music-player,kingsj/music-player,albertz/music-player,albertz/music-player,kingsj/music-player,albertz/music-player,kingsj/music-player,albertz/music-player