ckpt.c:
Patch from Muni and Mark to properly calculate the header size
field so that the totem delivery assertion doesn't assert when
using ckpt services.

BKrev: 4256f3d0FFsh6CwpsXs-w4_225C4Wg


git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@581 fd59a12c-fef9-0310-b244-a6a79926bd2f