remove one unnecessary assignment when on Darwin.
remove one unnecessary assignment when on Darwin.

PeterMosmans/cipherscan,MikeDawg/cipherscan,MikeDawg/cipherscan,jvehent/cipherscan,PeterMosmans/cipherscan,jvehent/cipherscan,MikeDawg/cipherscan,PeterMosmans/cipherscan,jvehent/cipherscan