text.module/text_field_widget_form(): if($main_widget) unnecessary

In text.module, text_field_widget_form() tests whether $main_widget has been initialized:

  if ($main_widget) {
    // Conditionally alter the form element's type if text processing is enabled.
    if ($instance['settings']['text_processing']) {
      $element = $main_widget;
      $element['#type'] = 'text_format';
      $element['#format'] = isset($items[$delta]['format']) ? $items[$delta]['format'] : NULL;
      $element['#base_type'] = $main_widget['#type'];
    }
    else {
      $element['value'] = $main_widget;
    }
  }

It seems to me it always is, making the if condition unnecessary.