Merge bitcoin#12074: [qt] Optimizes boolean expression model && model…

…->haveWatchOnly()

6dda059 [qt] Simplifies boolean expression model && model->haveWatchOnly() (251)

Pull request description:

  This PR optimizes the boolean expression `model && model->haveWatchOnly()` to `model->haveWatchOnly()`.

  The boolean expression can be optimized because the method `TransactionView::exportClicked` already guards against a potential dereferenced null pointer by returning early if `model` is null.
  https://github.com/bitcoin/bitcoin/blob/63a4dc10876bfc61c2e87d35dcf17da2f0f8c316/src/qt/transactionview.cpp#L351-L353

Tree-SHA512: 8bdd0d05bf879745fa39d3ca7524471720ae08ceee9427d5a08776e7b56d18542ae87a6991cd6779e232305f504fdfc77223702b72ecbe231f5f5e98453456dd

src/qt/transactionview.cpp

@@ -420,7 +420,7 @@ void TransactionView::exportClicked()
     // name, column, role
     writer.setModel(transactionProxyModel);
     writer.addColumn(tr("Confirmed"), 0, TransactionTableModel::ConfirmedRole);
-    if (model && model->haveWatchOnly())
+    if (model->haveWatchOnly())
         writer.addColumn(tr("Watch-only"), TransactionTableModel::Watchonly);
     writer.addColumn(tr("Date"), 0, TransactionTableModel::DateRole);
     writer.addColumn(tr("Type"), TransactionTableModel::Type, Qt::EditRole);