Fix AKSampler release bug found by Matt
Fix AKSampler release bug found by Matt

eljeff/AudioKit,audiokit/AudioKit,audiokit/AudioKit,eljeff/AudioKit,audiokit/AudioKit,audiokit/AudioKit,eljeff/AudioKit,adamnemecek/AudioKit,adamnemecek/AudioKit,adamnemecek/AudioKit,adamnemecek/AudioKit,eljeff/AudioKit