Fixes bug #2259. Sorts the files added to playlist using the Simple Open File is used.

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/qt4/dialogs_provider.cpp

@@ -399,6 +399,7 @@ void DialogsProvider::addFromSimple( bool pl, bool go)
 {
     QStringList files = DialogsProvider::showSimpleOpen();
     int i = 0;
+	files.sort();
     foreach( const QString &file, files )
     {
         playlist_Add( THEPL, qtu( toNativeSeparators( file ) ), NULL,