fix arena initialization

packages/gecode/clpfd.yap

@@ -89,6 +89,7 @@
 
 :- use_module(library(gecode)).
 :- use_module(library(maplist)).
+
 :- reexport(library(matrix), [(<==)/2, op(600, xfx, '<=='),
 	    op(700, xfx, in),
 	    op(700, xfx, ins),
@@ -223,7 +224,7 @@ sum( L, Op, V) :-
 	check(L, NL),
 	check(V, NV),
 	post( rel(sum(NL), Op, NV), Env, _).
-( A #<==> VBool) :-
+( ( A #<==> VBool )) :-
 	get_home(Space-Map),
 	check(A, NA),
 	check(VBool, NVBool),

packages/gecode/gecode.yap

@@ -2,5 +2,5 @@
 /* just for program analysis */
 
 :- include(gecode4_yap_hand_written).
-:- include('4.2.1/gecode_yap_auto_generated').
+:- include('4.2.1/gecode_yap_auto_generated.yap').