FIXED: meta_predicate/1 directive for call_nth/2.
This addresses
@@ -183,6 +183,8 @@ partial_string_tail(String, Tail) :-
:- dynamic(i_call_nth_nesting/2).
:- dynamic(i_call_nth_counter/1).
+:- meta_predicate(call_nth(0, ?)).
+
call_nth(Goal, N) :-
can_be(integer, N),
( integer(N), N =< 0,
