Backported from X.org:

   commit 152090ce442e94de1ae920208a92931af6493c8c
   Author: Adam Jackson <ajax@nwnk.net>
   Date:   Wed Mar 15 16:33:12 2006 +0000

   Coverity # 487: Check version number correctly.
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>

Fixes ArcticaProject/nx-libs#542