Re: buildable interface testers error

[Torsten Schoenfeld <kaffeetisch gmx de>]

Torsten Schoenfeld wrote:
> > The error message is fairly obscure.  But an error from
> > Glib::Object::Subclass is probably good.  For myself I'll want to
> > quietly drop Buildable when not available, but for other interfaces that
> > could be bad.
>
> We could check that the interface is actually registered before calling 
> _ADD_INTERFACE, as in the attached patch.  Does this make sense?  muppet?

Committed.