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/apply.c

@@ -704,6 +704,7 @@ struct obj *obj;
 			      "Yow!  The mirror stares back!" :
 			      "Yikes!  You've frozen yourself!");
 			nomul(-rnd((MAXULEV+6) - u.ulevel));
+			nomovemsg = 0;
 			} else You("stiffen momentarily under your gaze.");
 		    } else if (youmonst.data->mlet == S_VAMPIRE)
 			You("don't have a reflection.");