add lock safety to consensus.GenesisBlock()
add lock safety to consensus.GenesisBlock()

NebulousLabs/Sia,ChrisSchinnerl/Sia,johnathanhowell/Sia,mnsl/Sia,mharkus/Sia,Mingling94/Sia,ericflo/Sia,mtlynch/Sia,MrStrong/Sia,NebulousLabs/Sia,ChrisSchinnerl/Sia,mharkus/Sia,rivine/rivine,ericflo/Sia,mtlynch/Sia,mnsl/Sia,rivine/rivine,MrStrong/Sia