dblog_filter_form_validate($form, &$form_state)Validate result from dblog administration filter form.
modules/dblog/dblog.admin.inc, line 313
<?php
function dblog_filter_form_validate($form, &$form_state) {
if ($form_state['values']['op'] == t('Filter') && empty($form_state['values']['type']) && empty($form_state['values']['severity'])) {
form_set_error('type', t('You must select something to filter by.'));
}
}
?>