message: Fix: shown fee when sending public coins
diff: @@ -228,7 +228,7 @@ WalletModel::SendCoinsReturn WalletModel::sendCoins(const QList<SendCoinsRecipie
  }
  }
  - int64_t nBalance = 0;
  + int64_t nBalance = 0, nFeeRequired = 0;
  std::vector<COutput> vCoins;
  wallet->AvailableCoins(vCoins, true, coinControl);
  @@ -394,7 +394,6 @@ WalletModel::SendCoinsReturn WalletModel::sendCoins(const QList<SendCoinsRecipie
  }
  }
  - int64_t nFeeRequired = 0;
  int nChangePos = -1;
  bool fCreated = wallet->CreateTransaction(vecSend, wtx, nFeeRequired, nChangePos, coinControl);
  @@ -465,7 +464,7 @@ WalletModel::SendCoinsReturn WalletModel::sendCoins(const QList<SendCoinsRecipie
  } // wallet->cs_wallet
  };
  - return SendCoinsReturn(OK, 0, hex);
  + return SendCoinsReturn(OK, nFeeRequired, hex);
  }
  WalletModel::SendCoinsReturn WalletModel::sendCoinsAnon(const QList<SendCoinsRecipient> &recipients, const CCoinControl *coinControl)
  