- fixes AWC-566 and AWC-195 and AWC-221
. Fix for unreported issue where an error would occur when showing the details of a locked doc where it's associated working-copy had been deleted.
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2912 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261