Make HoOA alignment change depend on object ID

The same Helm of opposite alignment will always make
the same alignment change for neutrals.

src/do_wear.c

@@ -391,7 +391,7 @@ Helmet_on(VOID_ARGS)
 		   properties, including levitation; uarmh could get
 		   dropped or destroyed here */
 		uchangealign((u.ualign.type != A_NEUTRAL) ? -u.ualign.type :
-				rn2(2) ? A_CHAOTIC : A_LAWFUL, 1);
+			     (uarmh->o_id % 2) ? A_CHAOTIC : A_LAWFUL, 1);
 	     /* makeknown(uarmh->otyp);   -- moved below, after xname() */
 		/*FALLTHRU*/
 	case DUNCE_CAP: