QGStreamerVideoWidget may cause stack overflow on destruction

QGStreamerVideoWidget catches the WinIdChange event, but ~QWidget() will also send this (setting the WinId to 0). The event handler then calls QWidget::winId() which calls QWidget::createWinId() which calls winId() and so, in my case 68342 times until we run out of stack and the program terminates.

This does NOT happen when app.quit() is called. But it happens if I close the X window using 'close' or press the 'x' button. 

It may be a QWidget problem as well. Should winId() call createWinId() if we are calling from ~QWidget()?  "if (data->winid == 0 && d->data->in_destructor) return 0; " 

Or QGstreamerVideoWidget should ignore this event when QApplicationPrivate::is_app_closing is true.