Audio; prevent crashing from trying to kill non-existing sounds
Audio; prevent crashing from trying to kill non-existing sounds

mrcdk/snow,underscorediscovery/snow,mrcdk/snow,underscorediscovery/snow,mrcdk/snow,snowkit/snow,mrcdk/snow,underscorediscovery/snow,snowkit/snow,mrcdk/snow,mrcdk/snow,snowkit/snow