message: Simplify computing broadcast_num_dims
diff: @@ -445,9 +445,9 @@ Status GetTrtBroadcastShape(const TRT_TensorOrWeights& operand_l,
  // Compute the output dimensions.
  const int broadcast_num_dims =
  std::max(operand_l.GetTrtDims().nbDims +
  - (use_implicit_batch && (operand_l.is_tensor() ? 1 : 0)),
  + use_implicit_batch && operand_l.is_tensor(),
  operand_r.GetTrtDims().nbDims +
  - (use_implicit_batch && (operand_r.is_tensor() ? 1 : 0)));
  + use_implicit_batch && operand_r.is_tensor());
  int output_l[max_nb_dims], output_r[max_nb_dims];
  TF_RETURN_IF_ERROR(compute_output_dims(operand_l, broadcast_num_dims,
  output_l, operand_l_new_dims));
  