Fix mining: need to use GetPoWHash function for POW block work validation
Fix mining: need to use GetPoWHash function for POW block work
validation

Meee32/net2,Meee32/net2,birty/net2,Meee32/net2,birty/net2,birty/net2,birty/net2,birty/net2,Meee32/net2,Meee32/net2