Fix possible nullref in MusicController (#6379)
Fix possible nullref in MusicController (#6379)

Fix possible nullref in MusicController
EVAST9919/osu,ppy/osu,johnneijzen/osu,peppy/osu,NeoAdonis/osu,johnneijzen/osu,UselessToucan/osu,smoogipoo/osu,NeoAdonis/osu,EVAST9919/osu,2yangk23/osu,ppy/osu,2yangk23/osu,ZLima12/osu,peppy/osu-new,NeoAdonis/osu,peppy/osu,smoogipoo/osu,UselessToucan/osu,ZLima12/osu,ppy/osu,UselessToucan/osu,peppy/osu,smoogipooo/osu,smoogipoo/osu