fix -Wextra in Test

src/Mod/Test/Gui/AppTestGui.cpp

@@ -50,6 +50,8 @@ public:
 private:
     Py::Object new_UnitTest(const Py::Tuple& args)
     {
+        if (!PyArg_ParseTuple(args.ptr(), ""))
+            throw Py::Exception();
         return Py::asObject(new TestGui::UnitTestDialogPy());
     }
     Py::Object setTest(const Py::Tuple& args)

src/Mod/Test/Gui/UnitTestImp.cpp

@@ -117,6 +117,8 @@ void UnitTestDialog::setProgressColor(const QColor& col)
  */
 void UnitTestDialog::on_treeViewFailure_itemDoubleClicked(QTreeWidgetItem * item, int column)
 {
+    Q_UNUSED(column);
+
     QString text = item->data(0, Qt::UserRole).toString();
 
     QMessageBox msgBox(this);