Fix the issue that can not read Int64

[zwang]

Int64 can be saved to database, but if the Int64 is bigger than Int32.Max, when read that number back from database, it is an unexpected value.

[zwang]

Hi Regis,
Thank you for pointing out. After a second thought, I think my solution is not 100%, especially for 32bit device. So I just made another commit to make sure it works both on 32/64 bits device/simulator.

[RegisStGelais]

I tested your new commit to both 32 bits and 64 bits simulators. It seems to be working as expected.
Tks.

[zwang]

Great. Thank you for all the feedback! 👍