Used by the routines at upd_160_to_163, upd_119 and cauldron_consume.

Also reached from upd_160_to_163, upd_119 and cauldron_consume. Type 1 has no handler; the renderer (calc_pixel_XY_and_render) wipes a type 1 object one last time and then sets its type to 0, freeing the record.