Two consts

src/gui/PreviewEdit.cc

@@ -109,7 +109,7 @@ void PreviewEdit::resizeEvent(QResizeEvent *event)
  */
 void PreviewEdit::dragMoveEvent(QDragMoveEvent *event)
 {
-	QMainWindow* preview_window(qobject_cast<QMainWindow*>(this->parent()->parent()->parent())); //QStackedWidget->QTabWidget->PreviewWindow
+	const QMainWindow* preview_window(qobject_cast<QMainWindow*>(this->parent()->parent()->parent())); //QStackedWidget->QTabWidget->PreviewWindow
 	if (preview_window) {
 		if (event->mimeData()->hasUrls()) {
 			preview_window->statusBar()->showMessage(tr("Drop files over the menu or tab titles to open."));

src/gui/PreviewWindow.cc

@@ -245,7 +245,7 @@ void PreviewWindow::addIniTab(const QString& infile)
 	preview_editor->setPlainText(ini_contents); //without undo history --> can't undo to empty
 
 	const QString loaded_file = infile.isNull()? getMainWindow()->getIni()->getFilename() : infile;
-	QFileInfo file_info(loaded_file);
+	const QFileInfo file_info(loaded_file);
 	QString file_name(file_info.fileName());
 	QString file_path;
 	if (file_info.exists()) //avoid warning