message: gui: Fix leak in CoinControlDialog::updateView
diff: @@ -766,8 +766,7 @@ void CoinControlDialog::updateView(int nCoinType)
  if (nCoinType == OUTPUT_STANDARD && !CoinControlDialog::fSpendingZerocoin) {
  for (const auto &coins : model->wallet().listCoins()) {
  - CCoinControlWidgetItem *itemWalletAddress = new CCoinControlWidgetItem();
  - itemWalletAddress->setCheckState(COLUMN_CHECKBOX, Qt::Unchecked);
  + CCoinControlWidgetItem *itemWalletAddress{nullptr};
  QString sWalletAddress = QString::fromStdString(EncodeDestination(coins.first));
  QString sWalletLabel = model->getAddressTableModel()->labelForAddress(sWalletAddress);
  if (sWalletLabel.isEmpty())
  @@ -775,7 +774,7 @@ void CoinControlDialog::updateView(int nCoinType)
  if (treeMode) {
  // wallet address
  - ui->treeWidget->addTopLevelItem(itemWalletAddress);
  + itemWalletAddress = new CCoinControlWidgetItem(ui->treeWidget);
  itemWalletAddress->setFlags(flgTristate);
  itemWalletAddress->setCheckState(COLUMN_CHECKBOX, Qt::Unchecked);
  