add missing fact to beginning of tmember_t/3 (#1275)

diff --git a/src/lib/reif.pl b/src/lib/reif.pl
index a1d3141900cf7bcc6d06d675af355e0fc80d0feb..c0e14989227d7543975cbc94927c10986904b26d 100644 (file)
--- a/src/lib/reif.pl
+++ b/src/lib/reif.pl
@@ -79,5 +79,6 @@ tmember(P_2, [X|Xs]) :-
 
 :- meta_predicate(tmember_t(2, ?, ?)).
 
+tmember_t(_P_2, [], false).
 tmember_t(P_2, [X|Xs], T) :-
    if_( call(P_2, X), T = true, tmember_t(P_2, Xs, T) ).