message: clear initialized flag in scoped_bson_t::steal
diff: @@ -119,6 +119,8 @@ bsoncxx::document::value scoped_bson_t::steal() {
  std::uint32_t length;
  std::uint8_t* buff = bson_destroy_with_steal(bson(), true, &length);
  + _is_initialized = false;
  +
  return bsoncxx::document::value(buff, length, bson_free_deleter);
  }
  