Build broken by new gnc-get-default-report-font-family function

[Jesse Weinstein]

On Wed, 2010-06-23 at 10:10 +0200, Geert Janssens wrote: 
> I guess that the changes in 
> r19285 now require this header in the report system's swig wrapper as well.
> 
> I can't test this myself, I don't have a system with guile 1.6 available here. 
> I have attached a patch though that I think will solve this issue.
> 
> Can you try to apply it and see if it works now ?

Yes, that appears to solve the problem; please commit it.  Thanks!

Jesse