git issue #994 - killed by a touch of death

Issue reported by vultur-cadens:  cause of death reason for touch
of death and death due to loss of strength only showed the cause,
not the monster spellcaster who was responsible.

This changes
|Killed by a touch of death.
to
|Killed by the touch of death inflicted by the Wizard of Yendor.
and
|Killed by terminal fraility.
to
|Killed by strength loss inflicted by a chameleon imitating an arch-lich.
(The 'imitating' part doesn't fit on the tombstone but will be present
in logfile/xlogfile.)

Noticed while implemented this:  touch of death was modifying u.uhpmax
and basing death vs damage on that even when hero was polymorphed.
It now rehumanizes the hero in that situation.

Closes #994

src/uhitm.c

@@ -3477,8 +3477,10 @@ mhitm_ad_pest(struct monst *magr, struct attack *mattk,
 }
 
 void
-mhitm_ad_deth(struct monst *magr, struct attack *mattk UNUSED,
-              struct monst *mdef, struct mhitm_data *mhm)
+mhitm_ad_deth(
+    struct monst *magr,
+    struct attack *mattk UNUSED,
+    struct monst *mdef, struct mhitm_data *mhm)
 {
     struct permonst *pd = mdef->data;
 
@@ -3501,7 +3503,7 @@ mhitm_ad_deth(struct monst *magr, struct attack *mattk UNUSED,
         case 18:
         case 17:
             if (!Antimagic) {
-                touch_of_death();
+                touch_of_death(magr);
                 mhm->damage = 0;
                 return;
             }