* buffer.c (Fmove_overlay): If the overlay is in no buffer and the

* buffer.c (Fmove_overlay): If the overlay is in no buffer and the
	BUFFER argument has been omitted, put it in the current buffer,
	for symmetry with move-marker.

	* buffer.c (Fdelete_overlay): Make the overlay's markers point
	nowhere, not at 1.  Do this after calling redisplay_region, so
	that code knows what section has changed.