Merge #10673: [qt] Avoid potential null pointer dereference in TransactionView::exportClicked()

fd9599b [qt] Avoid potential null pointer dereference in TransactionView::exportClicked() (practicalswift)

Tree-SHA512: 33cbb65bd86aceb58918eb0a19e1727599a22285e7c89d4e7d3b2639c879dc8939708fd506006c6c092f624050d1131f997cc37f837cb980aa440f8abe5a3c18

Author: laanwj

src/qt/transactionview.cpp

@@ -336,6 +336,10 @@ void TransactionView::changedAmount(const QString &amount)
 
 void TransactionView::exportClicked()
 {
+    if (!model || !model->getOptionsModel()) {
+        return;
+    }
+
     // CSV is currently the only supported format
     QString filename = GUIUtil::getSaveFileName(this,
         tr("Export Transaction History"), QString(),