fixed crash when trying to sort data files on Linux

Author: Youda008

Sources/MainWindow.hpp

@@ -415,6 +415,7 @@ class MainWindow : public QMainWindow, private DialogWithPaths {
 		ConfigFile( const QString & fileName ) : fileName( fileName ) {}
 		ConfigFile( const QFileInfo & file ) : fileName( file.fileName() ) {}
 		QString getID() const { return fileName; }
+		const QString & getFilePath() const { return fileName; }  // it's not a path, but it's only used for sorting, so it's ok
 	};
 	ReadOnlyDirectListModel< ConfigFile > configModel;    ///< list of config files found in pre-defined directory
 
@@ -424,6 +425,7 @@ class MainWindow : public QMainWindow, private DialogWithPaths {
 		SaveFile( const QString & fileName ) : fileName( fileName ) {}
 		SaveFile( const QFileInfo & file ) : fileName( file.fileName() ) {}
 		QString getID() const { return fileName; }
+		const QString & getFilePath() const { return fileName; }  // it's not a path, but it's only used for sorting, so it's ok
 	};
 	ReadOnlyDirectListModel< SaveFile > saveModel;    ///< list of save files found in pre-defined directory
 
@@ -433,6 +435,7 @@ class MainWindow : public QMainWindow, private DialogWithPaths {
 		DemoFile( const QString & fileName ) : fileName( fileName ) {}
 		DemoFile( const QFileInfo & file ) : fileName( file.fileName() ) {}
 		QString getID() const { return fileName; }
+		const QString & getFilePath() const { return fileName; }  // it's not a path, but it's only used for sorting, so it's ok
 	};
 	ReadOnlyDirectListModel< DemoFile > demoModel;    ///< list of demo files found in pre-defined directory