continuation of previous patch to return 0 on empty @lab_test_ids - C::Local::Worklist::Histology::_format_lab_test_data() needs to test for before performing hashref operation}
git-svn-id: https://jti.org.uk/svn/hmds_lims/trunk@1558 4177bd82-f056-0410-812d-caef170e3fa0