[4.4.0] QFileDialog does not show non-english characters

This issue has been verified on Linux. When the LANG environment variable is different from en_US.UTF-8 or en_GB.UTF-8, all directory entries containing non-English characters like "ä", "ö" or "ü" won't be shown. Other values used were pt_PT.UTF-8 and de_DE.UTF-8, none works.

Simple code to launch the dialog:

//-----------------------------------
#include <QtGui>

int main( int argc, char * argv[] )
{
QApplication app( argc, argv );
QFileDialog dlg;
dlg.show();
return app.exec();
}
//-----------------------------------