wizard #poly and #levelgain

This adds the wizard #poly and #levelgain commands.

src/trap.c

@@ -957,7 +957,7 @@ 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();
+		    polyself(FALSE);
 		}
 		break;
 	    }