ckpt.c:
defect 631
Fix segfault if null pointer passed to selection object address of
saCkptSelectionObjectGet

BKrev: 42b319acUTulJHw99ALuUlMGTcgL1g


git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@681 fd59a12c-fef9-0310-b244-a6a79926bd2f