[xmonad] darcs patch: handle-windows-without-size-hint

1 patch for repository http://code.haskell.org/XMonadContrib: Fri Mar 9 01:27:13 EST 2012 mathstuf@gmail.com * handle-windows-without-size-hint When a window has no size hint set, the memory returned by XGetWMNormalHints may be pretty useless. This can cause hint-less windows to bounce between 1x1, 1xn, mx1, the proper size, and (rarely) fullscreen when the layoutHints layout modifier from xmonad-contrib is used. This patch fixes X.L.LayoutHints to ignore windows without a size hint by using the new functions in X.Operations that return SizeHint as a Maybe.