menubar does not show up when it's parent is not JFrame

Hello,

when in swixml descriptor menubar has different parent then jframe, it
won't show up.
after looking into source code I found where the problem was. It's in
the Parser.addChild method.
This could be a fix:

***************
*** 784,794 ****
      if (component instanceof JMenuBar) {
        try {
          Method m = parent.getClass().getMethod( "setJMenuBar", new
Class[]{JMenuBar.class} );
!         if (m != null) {
!           m.invoke( parent, new Object[]{component} );
!         } else {
!           parent.add(component);
!         }
        } catch (Exception e) {
          // intentionally empty
        }
--- 784,792 ----
      if (component instanceof JMenuBar) {
        try {
          Method m = parent.getClass().getMethod( "setJMenuBar", new
Class[]{JMenuBar.class} );
!         m.invoke( parent, new Object[]{component} );
!       } catch (NoSuchMethodException e) {
!               parent.add(component);
        } catch (Exception e) {
          // intentionally empty
        }

Cheers,
Vitali