Redmine › Extended Fields

In our Redmine, there are some custom boolean fields which don’t have a value.
In this case, we get an internal error because of extended_queries_helper_patch.rb:

Completed 500 Internal Server Error in 1975.1ms
   ActionView::Template::Error (undefined method `value' for nil:NilClass):
    53:     <%=Rails.logger.info "issuenumber: " + issue.id.to_s%>
    54:     <% inline_columns.each do |column| >
    55:       <%=Rails.logger.info "column: " + column.name.to_s%>
    56:       <%= content_tag 'td', column_content(column, issue), :class => column.respond_to?(:css_classes) ? column.css_classes : column.name %>
    57:     < end %>
    58:   &lt;/tr&gt;

I have tried modifying line 27 of /lib/extended_queries_helper_patch.rb from

h(show_value(value))

to

unless value.nil?
                      h(show_value(value))
                    end

and it seems to work. What do you think of it?