life-saved, while helpless

Implement the suggestion by entrez to avoid "while helpless" in the
reason for the second death if hero gets killed, life-saved, and
killed again at the same time.  Life saving sets 'multi' to -1 which
prevents the hero from moving again until next turn and is intended
to make the sequencing of "you survived that attempt on your life"
work if you're being interrupted during some multi-turn activity.

It used to behave differently when the first death occurred while
engaged in some voluntary multi-turn activity.  I've removed that
because I couldn't figure out why; it might need to be put back.

src/end.c

@@ -924,10 +924,15 @@ savelife(int how)
     }
     g.nomovemsg = "You survived that attempt on your life.";
     g.context.move = 0;
-    if (g.multi > 0)
-        g.multi = 0;
-    else
-        g.multi = -1;
+
+    g.multi = -1; /* can't move again during the current turn */
+    /* in case being life-saved is immediately followed by being killed
+       again (perhaps due to zap rebound); this text will be appended to
+          "killed by <something>, while "
+       in high scores entry, if any, and in logfile (but not on tombstone) */
+    g.multi_reason = Role_if(PM_TOURIST) ? "being toyed with by Fate"
+                                         : "attempting to cheat Death";
+
     if (u.utrap && u.utraptype == TT_LAVA)
         reset_utrap(FALSE);
     g.context.botl = TRUE;