fixed msvc build
fixed msvc build

yann300/mix,chriseth/mix,vaporry/mix,ethereum/mix,vaporry/mix,chriseth/mix,LianaHus/mix,yann300/mix,tomthebuzz/mix,tomthebuzz/mix,chriseth/mix,LefterisJP/mix,ethereum/mix,LefterisJP/mix,vaporry/mix,LefterisJP/mix,tomthebuzz/mix,ethereum/mix,LianaHus/mix,yann300/mix,LianaHus/mix