Pentagram: Routine at C285

C285: The update routine for things that kill but never move (graphics 23, 30, 74 and 75)

Makes the thing deadly both ways (MAKE_DEADLY) and sets its drawing nudge; it is not marked for redrawing, as nothing about it changes.
STILL_DEADLY	C285	CALL MAKE_DEADLY	deadly; the nudge (-16, -8), and return from there
	C288	JP DRAW_AT_L16_D8	deadly; the nudge (-16, -8), and return from there