ckpt-wr.c, ckpt-rd.c:
Improved synchronization test code from Muni Bajpai.

BKrev: 4238784c5RBxBXc3aHA68KOVGhAEWw


git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@526 fd59a12c-fef9-0310-b244-a6a79926bd2f