ckpt.c:
defect 630
if a checkpoint is unlinked then opened it should return
SA_AIS_ERR_NOT_EXIST

BKrev: 42b31972GC0d7zd0Xw4yt4RcQrxcCg


git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@679 fd59a12c-fef9-0310-b244-a6a79926bd2f