this ensures that if filename is to be created the fallback lookup is not
used and in case filename is existing directory instead of actual file, as
QFile::exists() may return true for directories, it does not end up as
relative path passed to QSetting which leads to QSettings object being
created with relative name rather than the fallback
Signed-off-by: Ivailo Monev <xakepa10@laimg.moc>
otherwise the constructor can be shadowed by the default QSettings
constructor which does not take any arguments at all
Signed-off-by: Ivailo Monev <xakepa10@laimg.moc>