Sun Jun 28 08:32:20 1998  Tim Janik  <timj@gtk.org>

        * app/layer.c (gimp_layer_mask_get_type):
        (gimp_layer_get_type):
        * app/drawable.c (gimp_drawable_get_type):
        * app/channel.c (gimp_channel_get_type):
        return a GtkType value and initialize the GtkTypeInfo structure
        correctly.

        * app/layer.h:
        * app/drawable.h:
        * app/channel.h:
        provide GIMP_TYPE_* and GIMP_IS_*_CLASS() macros.