bug fix: use of bytes, bytes32
bug fix: use of bytes, bytes32

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