Use PyList_SET_ITEM for list initialization in _isl.c

diff --git a/pypol/_isl.c b/pypol/_isl.c
index a62d650..b9d6092 100644 (file)
--- a/pypol/_isl.c
+++ b/pypol/_isl.c
@@ -19,7 +19,8 @@ int _isl_isl_basic_set_add_constraint_list(__isl_take isl_constraint *c,
     if (value == NULL) {
         return -1;
     }
-    return PyList_SetItem(list->constraints, list->cursor++, value);
+    PyList_SET_ITEM(list->constraints, list->cursor++, value);
+    return 0;
 }
 
 static PyObject * _isl_isl_basic_set_constraints(PyObject *self,