message: Remove the 0 reward check for mining.
diff: @@ -3043,7 +3043,7 @@ bool CWallet::CreateCoinStake(const CKeyStore& keystore, unsigned int nBits, uin
  return error("CreateCoinStake : Transaction timestamp check failure.");
  const CChainParams& chainParams = Params();
  int64_t nReward = nFees + GetBlockSubsidy(pindexPrev->nHeight, chainParams.GetConsensus());;
  - if (nReward <= 0)
  + if (nReward < 0)
  return false;
  nCredit += nReward;
  