QDoubleSpinbox behaviour with C-locale and large values.

With the LANG environmental variable set to LANG=de_DE.utf8
Using the following example code. If the value is set to 10000.00, the DoubleSpinbox displays this value as 10,00000

example code:
#include <QApplication>
#include <QDoubleSpinBox>

int main(int argc, char** argv)
{
QApplication app(argc,argv);
QDoubleSpinBox spin;
spin.setMaximum(99999);
spin.setLocale(QLocale::c());
spin.show();

return app.exec();
}