message: Fixed "unable to mint" error message
diff: @@ -676,7 +676,7 @@ bool CHDMintWallet::GetHDMintFromMintPoolEntry(const sigma::CoinDenomination den
  */
  bool CHDMintWallet::GenerateMint(const sigma::CoinDenomination denom, sigma::PrivateCoin& coin, CHDMint& dMint, boost::optional<MintPoolEntry> mintPoolEntry, bool fAllowUnsynced)
  {
  - if (znodeSyncInterface.IsBlockchainSynced() && !fAllowUnsynced && !(Params().NetworkIDString() == CBaseChainParams::REGTEST))
  + if (!znodeSyncInterface.IsBlockchainSynced() && !fAllowUnsynced && !(Params().NetworkIDString() == CBaseChainParams::REGTEST))
  throw ZerocoinException("Unable to generate mint: Blockchain not yet synced.");
  if(mintPoolEntry!=boost::none)
  