message: make elementwise ops work
diff: @@ -1240,8 +1240,7 @@ class ElementwiseOperationParser : public TFLiteOperationParser {
  TfLiteSubParams* tf_options = nullptr;
  RETURN_IF_ERROR(RetrieveBuiltinData(tflite_node, &tf_options));
  RETURN_IF_ERROR(CheckActivationSupported(tf_options->activation));
  - }
  - if (!IsOneArgumentOperation()) {
  + } else if (!IsOneArgumentOperation()) {
  return InvalidArgumentError("Incorrect operation type passed");
  }
  