Validate comment_admin_overview form submissions.

File

drupal-7.x/modules/comment/comment.admin.inc, line 146

Admin page callbacks for the comment module.

Code

function comment_admin_overview_validate($form, &$form_state) {
  $form_state['values']['comments'] = array_diff($form_state['values']['comments'], array(0));
  // We can't execute any 'Update options' if no comments were selected.
  if (count($form_state['values']['comments']) == 0) {
    form_set_error('', t('Select one or more comments to perform the update on.'));
  }
}