clm.c:
defect 635
saClmSelectionObjectGet crashes if selection object pointer is null

BKrev: 42b31a7e1tftUaCVpz36dDVxSI0wBA


git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@689 fd59a12c-fef9-0310-b244-a6a79926bd2f