NPE is thrown when mouse is takem over the menu.

Steps to reproduce:
---------------------
1) Run SwingSet2
2) Change the LAF to windows
3)Take mouse over the File menu DO NOT CLICK
4) Now press the right arraow key to go to 'Look & Feel' menu
It wil throw NPE

java.lang.NullPointerException
        at javax.swing.plaf.basic.BasicDesktopPaneUI$Actions.actionPerformed(BasicDesktopPane
UI.java:289)
        at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1540)
        at javax.swing.JComponent.processKeyBinding(JComponent.java:2449)
        at javax.swing.JComponent.processKeyBindings(JComponent.java:2495)
        at javax.swing.JComponent.processKeyEvent(JComponent.java:2412)
        at java.awt.Component.processEvent(Component.java:4911)
        at java.awt.Container.processEvent(Container.java:1569)
        at java.awt.Component.dispatchEventImpl(Component.java:3617)
        at java.awt.Container.dispatchEventImpl(Container.java:1627)
        at java.awt.Component.dispatchEvent(Component.java:3479)
        at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1713)
        at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:627)
        at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:831)
        at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:741)

        at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:592)
        at java.awt.Component.dispatchEventImpl(Component.java:3508)
        at java.awt.Container.dispatchEventImpl(Container.java:1627)
        at java.awt.Window.dispatchEventImpl(Window.java:1606)
        at java.awt.Component.dispatchEvent(Component.java:3479)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:208)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:157)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:151)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:143)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:104)

This is observed in Tiger b07.