finally finished but not eating

Finally apply the patch sent by <Someone> in 11/2003 for slashem-Bugs-799278,
updated to match the current code and handle additional cases.  The fix
is brute force: always ensure nomovemsg is set when nomul is called with
a negative value.  I also scanned the code for places manually setting
multi negative, they all set nomovemsg.  It would be nice to have a function
that did the right thing, but there are several special cases and I was
not feeling creative.

src/uhitm.c

@@ -2317,6 +2317,7 @@ boolean wep_was_destroyed;
 			    You("are frozen by %s gaze!",
 				  s_suffix(mon_nam(mon)));
 			    nomul((ACURR(A_WIS) > 12 || rn2(4)) ? -tmp : -127);
+			    nomovemsg = 0;
 			}
 		    } else {
 			pline("%s cannot defend itself.",