Update physfs to remove -Werror
Update physfs to remove -Werror

agry/x-com,agry/x-com,AndO3131/OpenApoc,Istrebitel/OpenApoc,FranciscoDA/OpenApoc,Istrebitel/OpenApoc,FranciscoDA/OpenApoc,agry/x-com,steveschnepp/OpenApoc,steveschnepp/OpenApoc,ShadowDancer/OpenApoc,AndO3131/OpenApoc,pmprog/OpenApoc,AndO3131/OpenApoc,FranciscoDA/OpenApoc,pmprog/OpenApoc,ShadowDancer/OpenApoc