the INVALID_OID is never generated by getNewOIDList(). Moreover, we can't answer
with an error in the case where we have no last OID but a last PTID.


git-svn-id: https://svn.erp5.org/repos/neo/branches/prototype3@1157 71dcc9de-d417-0410-9af5-da40c76e7ee4