add an object member to the structure. (weak_refs_notify): pass

add an object member to the structure. (weak_refs_notify): pass

2001-08-17  James Henstridge  <james@daa.com.au>

	* gobject.c (WeakRefStack): add an object member to the structure.
	(weak_refs_notify): pass wstack->object as extra argument to
	notify functions.
	(g_object_weak_ref): set wstack->object when initialising
	WeakRefStack.

	* gobject.h (GWeakNotify): add second argument to prototype which
	gives the pointer to where the object that is being disposed of
	was.