Support for updating custom fields using the received custom_fields array (#6345, #6403).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4481 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/issue.rb

@@ -229,6 +229,7 @@ class Issue < ActiveRecord::Base
     done_ratio
     estimated_hours
     custom_field_values
+    custom_fields
     lock_version
   ) unless const_defined?(:SAFE_ATTRIBUTES)