sonata-project/SonataAdminBundle — pull request #1345 by ehsan89 (2013-05-18 15:17:08+00:00)
Title: added a check if form_group.description is defined at line 35

As I faced an error saying "Key "description" for array with keys "fields" does not exist in SonataAdminBundle:CRUD:base_edit_form.html.twig at line 35"
using admin bundle with the media bundle, this change fixes the bug.