change to chainActive.Tip() in GetProofOfStakeReward()
change to chainActive.Tip() in GetProofOfStakeReward()
navcoindev/navcoin-core,navcoindev/navcoin-core,navcoindev/navcoin-core,navcoindev/navcoin-core,navcoindev/navcoin-core,navcoindev/navcoin-core