message: Fixed a warning about signed/unsighed var
diff: @@ -167,7 +167,7 @@ static proto::Config GenerateCFG() {
  static std::map<std::string, std::vector<float>> GenerateMatrix(const std::vector<size_t>& dim,
  std::vector<std::string> vars) {
  size_t size = 1;
  - for (int i = 0; i < dim.size(); ++i) {
  + for (size_t i = 0; i < dim.size(); ++i) {
  size *= dim[i];
  }
  // We don't care the contents in data
  @@ -180,7 +180,7 @@ static std::map<std::string, std::vector<float>> GenerateMatrix(const std::vecto
  static std::vector<float> GenerateExpected(const std::vector<size_t>& dim, size_t load_dim) {
  size_t size = 1;
  - for (int i = 0; i < dim.size(); ++i) {
  + for (size_t i = 0; i < dim.size(); ++i) {
  size *= dim[i];
  }
  std::vector<float> result(size);
  