Filter: fix filter comparison test

  if (t->cmp)

    return t->result == f_same(t->fn, t->cmp);

  if (!f_same(t->fn, t->fn)) {

    bt_result = bt_suite_result = 0;

    bt_log_suite_case_result(0, "The function doesn't compare to itself as the same");

    return 0;

  }

  linpool *tmp = lp_new_default(&root_pool);

  enum filter_return fret = f_eval(t->fn, tmp, NULL);

  rfree(tmp);

main(int argc, char *argv[])

{

  bt_init(argc, argv);

  bt_bird_init();

  bt_assert_hook = bt_assert_filter;

  struct config *c = NULL;

  struct parse_config_file_arg pcfa = { .cp = &c, .filename = BT_CONFIG_FILE };

  bt_test_suite_base(parse_config_file, "conf", (const void *) &pcfa, 0, 0, "parse config file");

  bt_assert(c);

  bt_test_suite_base(parse_config_file, "reconf", (const void *) &pcfa, 0, 0, "reconfigure with the same file");

  bt_assert(c);

  bt_bird_cleanup();

  struct symbol *s;

  WALK_LIST(s, c->symbols)

    if ((s->class == SYM_FUNCTION) || (s->class == SYM_FILTER))

      bt_assert_msg((s->flags & SYM_FLAG_SAME), "Symbol %s same check", s->name);

  if (c)

  {

  struct f_bt_test_suite *t;

  WALK_LIST(t, c->tests)

    bt_test_suite_base(run_function, t->fn_name, t, BT_FORKING, BT_TIMEOUT, "%s", t->dsc);

  }

  bt_bird_cleanup();

  return bt_exit_value();

}