fix #K1139 - corpse removed from ice box by monst

Rot and revive timers are turned off when a corpse gets put inside
an ice box.  They get turned back on when taken out of the ice box
by the hero but were being left off if taken out by a monster.
That resulted in corpses of arbitrary type behaving like lizard
corpses and never rotting away.

This fixes that.  It also changes troll corpse behavior.  Once put
in an ice box, a troll corpse will not get a new revive timer when
taken out, just an ordinary rot timer.

src/muse.c

@@ -1,4 +1,4 @@
-/* NetHack 3.6	muse.c	$NHDT-Date: 1581726278 2020/02/15 00:24:38 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.120 $ */
+/* NetHack 3.6	muse.c	$NHDT-Date: 1590870788 2020/05/30 20:33:08 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.127 $ */
 /*      Copyright (C) 1990 by Ken Arromdee                         */
 /* NetHack may be freely redistributed.  See license for details.  */
 
@@ -1958,6 +1958,8 @@ boolean vismon;
                     pline("%s removes %s.", upstart(mpronounbuf),
                           doname(xobj));
             }
+            if (container->otyp == ICE_BOX)
+                removed_from_icebox(xobj); /* resume rotting for corpse */
             /* obj_extract_self(xobj); -- already done above */
             (void) mpickobj(mon, xobj);
             res = 2;