error handling when a user doesn't have a stats (admin_users_html)

git-svn-id: https://svn.eionet.europa.eu/repositories/Naaya/trunk/eggs/Naaya@21050 a0171fae-0946-0410-966d-b1775066cd26
released 3.3.64, new version 3.3.65

git-svn-id: https://svn.eionet.europa.eu/repositories/Naaya/trunk/eggs/Naaya@21051 a0171fae-0946-0410-966d-b1775066cd26