make Merkle reads more robust
make Merkle reads more robust

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