Correct the mechanism of CheckBlock
Correct the mechanism of CheckBlock

CheckBlock will only check miner of blocks except genesis and first
block when alliance is assigned in genesis block.

OpenNetworking/gcoin-community,OpenNetworking/gcoin-community,OpenNetworking/gcoin-community,OpenNetworking/gcoin-community,OpenNetworking/gcoin-community,OpenNetworking/gcoin-community,OpenNetworking/gcoin-community