message: Fixed the interger to unsigned comparision issue.
  Fixed the warning in the file.
diff: @@ -204,7 +204,7 @@ class SingleOpModel {
  const int channel_index = params->quantized_dimension;
  std::vector<int32_t> shape(t->dims->size);
  - for (int i = 0; i < shape.size(); ++i) {
  + for (size_t i = 0; i < shape.size(); ++i) {
  shape[i] = t->dims->data[i];
  }
  const int32_t num_inputs = input_data.size();
  