Fix race relating to threads and saClmDispatch/saAmfDispatch.

BKrev: 40d6977ewZ8VFYD8mJyEaPWxg0tI7w


git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@21 fd59a12c-fef9-0310-b244-a6a79926bd2f