cham changes (trunk only)

This is a foundation patch for patches to follow.
- use a full short index for mon->cham field.
- The current system of providing CHAM_XXX values
  was limited to the 3 bits allocated in the bitfield and invalidated
  save/bones if the field was expanded.
- The current system didn't provide an easy backwards  change
  if multiple monster types wanted to use the bit, there was a one
  to one mapping:  For instance, if you wanted a CHAM_VAMPIRE,
  and you wanted vampires, vampire lords, and Vlad to use it, you
  would have to have CHAM_VAMPIRE, CHAM_VAMPIRE_LORD,
  and CHAM_VLAD defined to achieve that with the one-to-one backward
  mapping.
- This new way just uses the mon[] index in the mon->cham field and
  eliminates the need for CHAM_XXX  (CHAM_ORDINARY is still used).
- no longer requires the cham_to_pm mappings

src/trap.c

@@ -1,4 +1,4 @@
-/*	SCCS Id: @(#)trap.c	3.4	2003/12/26	*/
+/*	SCCS Id: @(#)trap.c	3.4	2004/06/12	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -1100,7 +1100,7 @@ glovecheck:		(void) rust_dmg(uarmg, "gauntlets", 1, TRUE, &youmonst);
 		    deltrap(trap);	/* delete trap before polymorph */
 		    newsym(u.ux,u.uy);	/* get rid of trap symbol */
 		    You_feel("a change coming over you.");
-		    polyself(FALSE);
+		    polyself(0);
 		}
 		break;
 	    }