Removing a role that front_page is managing for gives Undefined index notice

If you set up front_page to manage the front page for a role and then remove that role, the admin/config/front/arrange page gives a notice:

Notice: Undefined index: name in front_page_admin_arrange_form() (line 190 of /var/www/milk/sites/all/modules/front/front_page.admin.inc).

Steps to reproduce:

1. Create a role admin/people/permissions/roles
2. Set the front page module to handle the front page for the role you just created admin/config/front/settings
3. Remove the role that you created in step 1 admin/people/permissions/roles/edit/n (where n is the rid)
4. Check the front page arrange tab admin/config/front/arrange