Fix QFont::defaultFamily() in the case of Helvetica
Fix QFont::defaultFamily() in the case of Helvetica

kobolabs/qt-everywhere-4.8.0,kobolabs/qt-everywhere-4.8.0,kobolabs/qt-everywhere-4.8.0,kobolabs/qt-everywhere-4.8.0,kobolabs/qt-everywhere-4.8.0,kobolabs/qt-everywhere-4.8.0,kobolabs/qt-everywhere-4.8.0,kobolabs/qt-everywhere-4.8.0,kobolabs/qt-everywhere-4.8.0,kobolabs/qt-everywhere-4.8.0