message: fix clang compilation error
diff: @@ -112,6 +112,8 @@ TEST_F(MirrorPadOpTest, TestMirrorPadReflectLargeInput) {
  return i - kPad;
  else if (kInput + kPad <= i && i < kOutput)
  return 2 * kInput + kPad - 2 - i;
  + else
  + return -1;
  });
  test::ExpectTensorEqual<float>(expected, *GetOutput(0));
  @@ -144,6 +146,8 @@ TEST_F(MirrorPadOpTest, TestMirrorPadSymmetricLargeInput) {
  return i - kPad;
  else if (kInput + kPad <= i && i < kOutput)
  return 2 * kInput + kPad - 1 - i;
  + else
  + return -1;
  });
  test::ExpectTensorEqual<float>(expected, *GetOutput(0));
  