Fix a Y2038 bug in timeToFILETIME
Fix a Y2038 bug in timeToFILETIME

The old code truncated time_t to a 32-bit value
when using Int32x32To64. This example code has been fixed
on MSDN a while ago, so this change only updates it to
the current version.

More on this issue:
https://cookieplmonster.github.io/2022/02/17/year-2038-problem/

gulrak/filesystem,gulrak/filesystem