Mismatch between <something> and <something*> ?

[Neil Jerram]

Hello g-wrap/guile-gtk/guile-gnome hackers!  I've been trying to
extend guile-gnome so that it wraps the Hildon API used on the Nokia
770 as well as all the usual Gnome/GTK APIs.  My build now appears to
be completely successful, but when I try a simple Hello World app I
get a runtime error.

The app is this:

(use-modules (gnome-0))
(use-modules (gnome gtk)
             (gnome hildon))

(let ((app (make <hildon-app>))
      (appview (make <hildon-app-view>))
      (button (make <gtk-button> #:label "Hello World!")))
  (set-title app "Hello World")
  (set-appview app appview)
  (add appview button)
  (show-all app)
  (gtk-main))

And I get an error from the set-appview line like this (from memory,
as I don't have it in front of me right now):

ERROR: In set-appview:
ERROR: wrong type arg in position 2: <<hildon-app-view> 0x34569348>

Now the .def for the set-appview method says that its second parameter
should be a <hildon-app-view*>, so it looks like the problem might be
a mismatch between <hildon-app-view> and <hildon-app-view*> ...  But
then when I look at the .defs for lots of GTK widgets, and examples
that use them, I see lots of analogous cases where the method is
defined to take a <gtk-something*>, but it seems to work just fine to
pass it a <gtk-something>.

So does this mean that I'm missing some kind of declaration in the
Hildon defs, to allow <hildon-app-view> and <hildon-app-view*> to
match each other?  Or have I done something else wrong in the way I've
invoked g-wrap to create the Hildon wrapset?

Any help would be much appreciated.  (I can provide my source and
generated code, and any build output, if that would help.)

Thanks,
        Neil