message: Fix use memoryRequired function instead of hard code serialized data size
diff: @@ -81,8 +81,8 @@ void SigmaPrimitives<Exponent, GroupElement>::get_x(
  unsigned char* current = A.serialize(data);
  current = C.serialize(current);
  D.serialize(current);
  - hash.Write(data, 3 * 34);
  - unsigned char result_data[32];
  + hash.Write(data, 3 * A.memoryRequired());
  + unsigned char result_data[CSHA256::OUTPUT_SIZE];
  hash.Finalize(result_data);
  result_out = result_data;
  }
  