fix audio sample conversion issues in some systems
fix audio sample conversion issues in some systems

pmprog/OpenApoc,FranciscoDA/OpenApoc,Istrebitel/OpenApoc,steveschnepp/OpenApoc,steveschnepp/OpenApoc,FranciscoDA/OpenApoc,Istrebitel/OpenApoc,pmprog/OpenApoc,FranciscoDA/OpenApoc