setOutputFormat(NativeFormat) doesn't check for available printers, crashes dialog

Circumstances:
-a QPrintDialog is instanciated without passing a QPrinter pointer
-there are no printer available (for example when the windowsprintersupport.dll has not been deployed)
-we try to force the printer used by the QPrintDialog to be a native printer

Consequence: calling QPrintDialog::show() results in a crash

Pseudocode:

QPrinterInfo::availablePrinters().size() == 0;
QPrintDialog printDialog;
printDialog.printer()->setOutputFormat(QPrinter::NativeFormat);
printDialog.show();

this could be a duplicate of QTBUG-24716