Fix ruleset nullref
Fix ruleset nullref

NeoAdonis/osu,smoogipoo/osu,2yangk23/osu,UselessToucan/osu,EVAST9919/osu,peppy/osu,smoogipoo/osu,ppy/osu,ppy/osu,UselessToucan/osu,peppy/osu,smoogipoo/osu,peppy/osu-new,peppy/osu,UselessToucan/osu,NeoAdonis/osu,NeoAdonis/osu,2yangk23/osu,smoogipooo/osu,ppy/osu,EVAST9919/osu