[Bf-python] Object.link

[models at paposo.com]

It does decrement it correctly, but the old mesh is still in main's list of
meshe's after the user count drops to 0.  The previous script now works if
you do this to object.c:

self->object->data = data;
    id_us_plus (id);
    if (oldid)
    {
        if (oldid->us > 0)
        {
            oldid->us--;
   if(oldid->us == 0)                        //****new if when users are
zero get rid of it
   {
    if(self->object->type == OB_CAMERA)
     free_libblock(&G.main->camera, oldid);
    else if(self->object->type == OB_LAMP)
     free_libblock(&G.main->lamp, oldid);
    else if(self->object->type == OB_MESH)
     free_libblock(&G.main->mesh, oldid);
    else if(self->object->type == OB_CURVE)
     free_libblock(&G.main->curve, oldid);
   }                                                //**end new if
        }
        else
        {
            return (PythonReturnErrorObject (PyExc_RuntimeError,
                "old object reference count below 0"));
        }
    }

p.s. you've done a great job with nmesh. I have a tendency to question
everything, but im really just a noob.  :)