message: fix EnumTransformTest
  Summary:
  The test assumed `nextInt` would always be positive.
  makeitso
diff: @@ -108,7 +108,8 @@ enum ENUM_TYPE_2 {
  public static void test_join() {
  Enum obj = null;
  Random random = new Random();
  - int selector = random.nextInt() % 2;
  + int pos_rand = random.nextInt() & Integer.MAX_VALUE;
  + int selector = pos_rand % 2;
  if (selector == 0) {
  obj = ENUM_TYPE_1.ONE;
  } else if (selector == 1 || selector == -1) {
  