Handle possible SA_AIS_ERR_TRY_AGAIN status.

BKrev: 4239c886n6J6MzMfIVjaN1QvFnsfzg


git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@537 fd59a12c-fef9-0310-b244-a6a79926bd2f