Notice: Use of undefined constant ARRAY_FILTER_USE_KEY

Notice: Use of undefined constant ARRAY_FILTER_USE_KEY - assumed 'ARRAY_FILTER_USE_KEY' in _bricks_tree_items() (line 76 of /home/df8xz/www/sites/all/modules/bricks/bricks.module).

Fix:

$items = array_intersect_key($items, element_children($items));