Fixes ArcticaProject/nx-libs#704

Backport from kbproto:

  commit 2306fcd4c511d41ae4b31b9cbd9f79cf69287730
  Author: Dirk Wallenstein <halsmit@t-online.de>
  Date:   Fri Feb 5 20:42:43 2010 +0100

      Use the correct value for XkbAllAccessXEventsMask
Signed-off-by: Dirk Wallenstein <halsmit@t-online.de>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>