message: Ensure non native types pass through the API
diff: @@ -75,7 +75,7 @@ AddConstantTensorTyped(poplar::Graph&graph,
  const TYPE* data(static_cast<const TYPE*>(LiteralUtil::InternalData(literal)));
  if (num_elements == 0) {
  - tensor = graph.addConstantTensor(type, {0}, 0);
  + tensor = graph.addConstantTensor(type, {0}, (TYPE)0);
  } else if (num_elements == 1) {
  tensor = graph.addConstantTensor(type, dim, data[0]);
  } else {
  