message: Fix negative vout in transactions for regtests
diff: @@ -1947,7 +1947,7 @@ bool ReadBlockHeaderFromDisk(CBlock &block, const CDiskBlockPos &pos) {
  CAmount GetBlockSubsidy(int nHeight, const Consensus::Params &consensusParams, int nTime) {
  // Just want to make sure no one gets a dime before 28 Sep 2016 12:00 AM UTC
  - if (nTime < nStartRewardTime && !consensusParams.IsTestnet())
  + if (nTime < nStartRewardTime && !consensusParams.IsMain())
  return 0;
  // Genesis block is 0 coin
  