submenu with accelerator render bug

Having a submenu in a menubar that has an accelerator renders with the menu indicator on top of the the shortcut.

To reproduce

run this example
open menu
notice that the little triangle on top of the accelerator.

#include <QtGui>

class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = 0)
: QMainWindow(parent)

{ setCentralWidget(new QTextEdit(this)); QMenu *menu = menuBar()->addMenu(tr("&File")); menu->addAction("bar"); QMenu *m = menu->addMenu(style()->standardIcon(QStyle::SP_ArrowBack), "foo"); m->menuAction()->setShortcut(Qt::ControlModifier + Qt::Key_M); m->addAction("foo"); }

public slots:
};

#include "main.moc"

int main(int argc, char **argv)
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}