Fix potential race in looping sample
Fix potential race in looping sample

As mentioned via GitHub comments. Very unlikely for this to happen unless: the sample takes a short amount of time to load, is very short itself, and the update thread stalls until the sample fully completes.

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