QPrintDialog CurrentPage range doesn't work

Opening QPrintDialog with CurrentPage range default doesn't work on Windows at all. Other ranges works fine. Looking in to qprintdialog_win.cpp we can see that CurrentPage implementation is totally missing. Is there some special reason for that?

Here is one kind of patch code that fixed the missing feature:
Qt4: src\gui\dialogs\qprintdialog_win.cpp:123
Qt5: qtbase\src\printsupport\dialogs\qprintdialog_win.cpp:118

    else if (pdlg->printRange() == QPrintDialog::CurrentPage &&
             pdlg->isOptionEnabled(QPrintDialog::PrintCurrentPage))
        pd->Flags |= PD_CURRENTPAGE;

PrintCurrentPage option can be checked like above or maybe patch should enabled option if currentPage range is set? Otherwise CurrentPage is set but disabled.

Test code:

#include <QApplication>
#include <QPrintDialog>
#include <QPrinter>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QPrinter printer;
    QPrintDialog printDialog(&printer);
    printDialog.setOption(QAbstractPrintDialog::PrintCurrentPage, true);
    printDialog.setPrintRange(QAbstractPrintDialog::CurrentPage);
    printDialog.exec();
    return a.exec();
}

Someone could make decision with this and add to release.