add simple bound check
add simple bound check

smoogipoo/osu,ppy/osu,peppy/osu,UselessToucan/osu,UselessToucan/osu,peppy/osu-new,ppy/osu,NeoAdonis/osu,NeoAdonis/osu,ppy/osu,UselessToucan/osu,smoogipoo/osu,smoogipoo/osu,smoogipooo/osu,NeoAdonis/osu,peppy/osu,peppy/osu