Backported from X.org:

   Commit 6bb2dc02a7cffd6ed7dd28e88d584920a4150749
   Author: Adam Jackson <ajax@nwnk.net>
   Date:   Wed Mar 15 16:01:47 2006 +0000

   Coverity # 337: Remove useless NULL check.
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>