Undefined index: author in date_popup authored form_alter() on line 121.

Using this module when the Conditonal Fields module is enabled throws the following error on the Conditional Field admin page.

/admin/structure/dependencies

As fix I just wrote a check on $form['author'] around the code:

if(isset($form['author'])) {
      if (!($form['author']['#access'] && variable_get('date_popup_authored_enabled_' . $form['type']['#value'], 1))) {
        return;
      }
    

      $form['author']['date']['#type'] = 'date_popup';

      // If there is a date already available, rewrite it to conform to
      // Date Popup's expected format.
      if (!empty($form['author']['date']['#default_value'])) {
        $date = new DateObject($form['author']['date']['#default_value'], NULL, 'Y-m-d H:i:s O');
        $form['author']['date']['#default_value'] = $date->format('Y-m-d H:i:s');
      }

      // Set options specific to date_popup.
      $year_range = variable_get('date_popup_authored_year_range_' . $form['type']['#value'], 3);
      $form['author']['date']['#date_year_range'] = '-' . $year_range . ':+' . $year_range;
      $form['author']['date']['#date_format'] = variable_get('date_popup_authored_format_' . $form['type']['#value'], 'm/d/Y - H:i');

      // Unset options that are not relevant to date_popup
      unset($form['author']['date']['#maxlength']);
      unset($form['author']['date']['#description']);

      // We need to modify date popup's data during submit
      // @see http://drupal.org/node/847854
      $form['#submit'][] = 'date_popup_authored_node_form_submit';
    }
}

Can anyone confirm this problem or confirm that this is a decent enough fix?