message: Updated model_cmdline_flags.cc
  Fixed warning in the file
diff: @@ -261,7 +261,7 @@ void ReadModelFlagsFromCommandLineFlags(
  std::vector<string> mean_values =
  absl::StrSplit(parsed_model_flags.mean_values.value(), ',');
  QCHECK(mean_values.size() == model_flags->input_arrays_size());
  - for (int i = 0; i < mean_values.size(); ++i) {
  + for (size_t i = 0; i < mean_values.size(); ++i) {
  char* last = nullptr;
  model_flags->mutable_input_arrays(i)->set_mean_value(
  strtod(mean_values[i].data(), &last));
  @@ -278,7 +278,7 @@ void ReadModelFlagsFromCommandLineFlags(
  std::vector<string> std_values =
  absl::StrSplit(parsed_model_flags.std_values.value(), ',');
  QCHECK(std_values.size() == model_flags->input_arrays_size());
  - for (int i = 0; i < std_values.size(); ++i) {
  + for (size_t i = 0; i < std_values.size(); ++i) {
  char* last = nullptr;
  model_flags->mutable_input_arrays(i)->set_std_value(
  strtod(std_values[i].data(), &last));
  @@ -296,7 +296,7 @@ void ReadModelFlagsFromCommandLineFlags(
  std::vector<string> input_data_types =
  absl::StrSplit(parsed_model_flags.input_data_types.value(), ',');
  QCHECK(input_data_types.size() == model_flags->input_arrays_size());
  - for (int i = 0; i < input_data_types.size(); ++i) {
  + for (size_t i = 0; i < input_data_types.size(); ++i) {
  IODataType type;
  QCHECK(IODataType_Parse(input_data_types[i], &type));
  model_flags->mutable_input_arrays(i)->set_data_type(type);
  @@ -319,7 +319,7 @@ void ReadModelFlagsFromCommandLineFlags(
  std::vector<string> input_shapes =
  absl::StrSplit(parsed_model_flags.input_shapes.value(), ':');
  QCHECK(input_shapes.size() == model_flags->input_arrays_size());
  - for (int i = 0; i < input_shapes.size(); ++i) {
  + for (size_t i = 0; i < input_shapes.size(); ++i) {
  auto* shape = model_flags->mutable_input_arrays(i)->mutable_shape();
  shape->clear_dims();
  // Treat an empty input shape as a scalar.
  