Redmine

In tab GANTT when export gantt chart to PDF, subject of issues write subject(issue.subject) but not id(issue_id).

I solved this by changing /lib/redmine/helpers/gantt.rb, in def subject_for_issue and then change:
pdf_subject(options,"#{issue.id} #{issue.subject}")
But i had to do this allways after upgrading.
Is it possible to add this to redmine, i think that this is good for all users.

Thanks,
João Mendes