message: Updated verifier_test.cc
  Fixed warning in the file
diff: @@ -206,7 +206,7 @@ TEST(VerifyModel, TestRandomModificationIsNotAllowed) {
  std::string model_content(reinterpret_cast<char*>(builder.GetBufferPointer()),
  builder.GetSize());
  - for (int i = 0; i < model_content.size(); i++) {
  + for (size_t i = 0; i < model_content.size(); i++) {
  model_content[i] = (model_content[i] + 137) % 255;
  EXPECT_FALSE(Verify(model_content.data(), model_content.size(),
  MutableOpResolver{}, DefaultErrorReporter()))
  