Qt4: fix DIR_SEP on open.

Should fix #2142

modules/gui/qt4/components/open_panels.cpp

@@ -166,7 +166,7 @@ void FileOpenPanel::browseFile()
     QStringList files = QFileDialog::getOpenFileNames( this );
     foreach( const QString &file, files)
     {
-        QListWidgetItem *item = new QListWidgetItem( file, ui.fileListWidg );
+        QListWidgetItem *item = new QListWidgetItem( toNativeSeparators( file ), ui.fileListWidg );
         item->setFlags( Qt::ItemIsEditable | Qt::ItemIsEnabled );
         ui.fileListWidg->addItem( item );
     }
@@ -193,7 +193,7 @@ void FileOpenPanel::browseFileSub()
                            EXT_FILTER_SUBTITLE, p_intf->p_sys->filepath );
 
     if( files.isEmpty() ) return;
-    ui.subInput->setText( files.join(" ") );
+    ui.subInput->setText( toNativeSeparators( files.join(" ") ) );
     updateMRL();
 }