Fix #553

Author: root

Diff for: app/models/protected_branches_member.rb

@@ -1,5 +1,8 @@
 class ProtectedBranchesMember < ActiveRecord::Base
 
+  ## Attributes
+  attr_accessible :principal_id, :inherited_by
+
   ## Relations
   belongs_to :protected_branch, class_name: 'RepositoryProtectedBranche'
   belongs_to :principal