add contract EndHeight sanity check
add contract EndHeight sanity check

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