message: Fix serializer MSVC C4244
diff: @@ -43,14 +43,14 @@ void Reflect(Writer& visitor, unsigned& value) {
  }
  void Reflect(Reader& visitor, long& value) {
  - value = visitor.GetInt64();
  + value = long(visitor.GetInt64());
  }
  void Reflect(Writer& visitor, long& value) {
  visitor.Int64(value);
  }
  void Reflect(Reader& visitor, unsigned long& value) {
  - value = visitor.GetUint64();
  + value = (unsigned long)visitor.GetUint64();
  }
  void Reflect(Writer& visitor, unsigned long& value) {
  visitor.Uint64(value);
  