Redmine

I'm trying to get http://www.redmine.org/issues/2560 working.

I've patched all the required files, but the also get an 'Internal Server Error' when going to the bulk edit page.

The production.log file shows the following error:

ActionView::TemplateError (undefined method `each' for nil:NilClass) on line #43 of issues/bulk_edit.rhtml:
40: </p>
41: 
42: <p>
43:    <% @custom_fields.each do | field | %>
44:          <%= content_tag "label", field.name,:for => "custom_fields_#{field.id}" %>: <%= custom_field_tag_bulk_edit field %>
45:    <% end %>
46: </p>

The code added to issues/bulk_edit.rhtml was:

<p>
   <% @custom_fields.each do | field | %>
         <%=content_tag "label", field.name,:for => "custom_fields_#{field.id}" %>: <%= custom_field_tag_bulk_edit field%>
   <% end %>
</p>

I'm afraid I don't know enough Ruby to fix this straight away, but if some one could point me in the right direction that would be great.