Meta tags in forum and image gallery

I noticed that the image_gallery and the forum did not have meta tags.
It was actually pretty simple adding them.
Please review:
This piece of code has to com in the _nodewords_detect_type_and_ids() function

/* added by ednique :: nodewords for forums */
  if (arg(0) == 'forum' && is_numeric(arg(1))) {
    return array('type' => 'term', 'ids' => arg(1));
  }
  if (arg(0) == 'forum' && is_null(arg(1))) {
    return array('type' => 'vocabulary', 'ids' => variable_get('forum_nav_vocabulary', 0));
  }
  /* added by ednique :: nodewords for image_gallery */
  if (arg(0) == 'image' && is_null(arg(1))) {
    return array('type' => 'vocabulary', 'ids' => variable_get('image_gallery_nav_vocabulary', 0));
  }
  if (arg(0) == 'image' && is_numeric(arg(2))) {
    return array('type' => 'term', 'ids' => arg(2));
  }