Used by the routines at upd_131_to_133, init_cauldron_bubbles, upd_160_to_163, upd_168_to_175, upd_164_to_167, upd_120_to_126, upd_127, upd_112_to_118_184, upd_119, upd_103, upd_104_to_110 and upd_96_to_102.

The offset used by most small objects: the special objects, the cauldron's contents and a dozen more.