drupal_static return value isn't gotten by reference.

In file at_core/inc/plugins.inc return value of drupal_static function isn't gotten by reference.

function at_get_plugins($theme_name) {
  $plugins = drupal_static(__FUNCTION__, array());
  if (empty($plugins)) {
    if ($plugins_cache = cache_get('at_get_plugins_plugins')) {
      $plugins = $plugins_cache->data;
    }
    else {
      ...
    }

It causes troubles if drupal cache is off. When adaptivetheme appiarence form is submited, the huge of PHP warnings takes place because $plugins_list isn't defined.

It is actual for dev version, but string numbers in the patch don't pass for it.