message: allow None for UProperties
diff: @@ -1754,6 +1754,20 @@ bool ue_py_convert_pyobject(PyObject *py_obj, UProperty *prop, uint8 *buffer) {
  }
  }
  + if (py_obj == Py_None) {
  + auto casted_prop_class = Cast<UClassProperty>(prop);
  + if (casted_prop_class) {
  + casted_prop_class->SetPropertyValue_InContainer(buffer, nullptr);
  + return true;
  + }
  + auto casted_prop = Cast<UObjectPropertyBase>(prop);
  + if (casted_prop) {
  + casted_prop->SetObjectPropertyValue_InContainer(buffer, nullptr);
  + return true;
  + }
  + return false;
  + }
  +
  return false;
  }
  