H.ICCCMFocus had atom_WM_TAKE_FOCUS incorrectly removed

It is possible that this atom should be defined in the X11 library, but fix the
build of contrib for now. In any case, this would have to wait for a change and
release of the X11 binding.

rolling back:

Wed Jan  5 22:38:39 EST 2011  Adam Vogt <vogt.adam@gmail.com>
  * Remove accidental atom_WM_TAKE_FOCUS from H.ICCCMFocus
  
  The XMonad module exports this already

    M ./XMonad/Hooks/ICCCMFocus.hs -7 +1

XMonad/Hooks/ICCCMFocus.hs

@@ -19,7 +19,8 @@
 -----------------------------------------------------------------------------
 module XMonad.Hooks.ICCCMFocus
 (
-  takeFocusX
+  atom_WM_TAKE_FOCUS  
+, takeFocusX
 , takeTopFocus
 ) where
 
@@ -28,6 +29,11 @@ import XMonad.Hooks.SetWMName
 import qualified XMonad.StackSet as W
 import Control.Monad
 
+atom_WM_TAKE_FOCUS ::
+  X Atom
+atom_WM_TAKE_FOCUS =
+  getAtom "WM_TAKE_FOCUS"
+
 takeFocusX ::
   Window
   -> X ()