More than 2000 lines of code less in app/, instead of
if (instance->member)
{
g_object_unref/g_free/g_whatever (instance->member);
instance->member = NULL;
}
we now simply use
g_clear_object/pointer (&instance->member);
Totally WIP and later supposed to give simple access to all sorts of
things that can provide a GeglBuffer via the GimpPickable
interface. Currently only dropping of drawables and images is
supported.
