Fix potential nullref.
Fix potential nullref.

2yangk23/osu,osu-RP/osu-RP,johnneijzen/osu,NeoAdonis/osu,nyaamara/osu,EVAST9919/osu,ZLima12/osu,ppy/osu,naoey/osu,2yangk23/osu,DrabWeb/osu,Frontear/osuKyzer,ppy/osu,UselessToucan/osu,naoey/osu,UselessToucan/osu,EVAST9919/osu,Nabile-Rahmani/osu,DrabWeb/osu,smoogipoo/osu,tacchinotacchi/osu,theguii/osu,peppy/osu,smoogipooo/osu,peppy/osu,peppy/osu,UselessToucan/osu,johnneijzen/osu,ppy/osu,smoogipoo/osu,Damnae/osu,peppy/osu-new,ZLima12/osu,Drezi126/osu,smoogipoo/osu,NeoAdonis/osu,naoey/osu,RedNesto/osu,DrabWeb/osu,NeoAdonis/osu