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/pray.c

@@ -1207,6 +1207,7 @@ dosacrifice()
 			dmon->mpeaceful = TRUE;
 		    You("are terrified, and unable to move.");
 		    nomul(-3);
+		    nomovemsg = 0;
 		} else pline_The("%s.", demonless_msg);
 	    }
 
@@ -1737,6 +1738,7 @@ doturn()
 	    }
 	}
 	nomul(-5);
+	nomovemsg = 0;
 	return(1);
 }