message: Fixes for Andrey comments
diff: @@ -163,9 +163,8 @@ bool CHDMintWallet::LoadMintPoolFromDB()
  bool CHDMintWallet::GetSerialForPubcoin(const std::vector<std::pair<uint256, GroupElement>>& serialPubcoinPairs, const uint256& hashPubcoin, uint256& hashSerial)
  {
  bool fFound = false;
  - for(auto serialPubcoinPair : serialPubcoinPairs){
  - GroupElement pubcoin = serialPubcoinPair.second;
  - if(hashPubcoin == primitives::GetPubCoinValueHash(pubcoin)){
  + for(const auto& serialPubcoinPair : serialPubcoinPairs){
  + if(hashPubcoin == primitives::GetPubCoinValueHash(serialPubcoinPair.second)){
  hashSerial = serialPubcoinPair.first;
  fFound = true;
  break;
  