message: Fix sign-compare issues in task_utils.h
diff: @@ -117,7 +117,7 @@ inline void PopulateVector(const TfLiteTensor* tensor, std::vector<T>* data) {
  const T* results = GetTensorData<T>(tensor);
  size_t num = tensor->bytes / sizeof(tensor->type);
  data->reserve(num);
  - for (int i = 0; i < num; i++) {
  + for (size_t i = 0; i < num; i++) {
  data->emplace_back(results[i]);
  }
  }
  @@ -167,7 +167,7 @@ static TensorType* FindTensorByName(
  tensor_metadatas->size() != tensors.size()) {
  return nullptr;
  }
  - for (int i = 0; i < tensor_metadatas->size(); i++) {
  + for (flatbuffers::uoffset_t i = 0; i < tensor_metadatas->size(); i++) {
  if (strcmp(name.data(), tensor_metadatas->Get(i)->name()->c_str()) == 0) {
  return tensors[i];
  }
  