Backported from X.org:

   commit 72cc6307257fcbb800267464487bf918ee674328
   Author: Adam Jackson <ajax@nwnk.net>
   Date:   Wed Mar 15 16:32:05 2006 +0000

   Coverity # 491: Check version number correctly.
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>