Christoph M. Becker 2d94ee5f20 Avoid undefined behavior in Windows ftok(3) emulation ...

`.nFileIndexHigh` is a unsigned 32bit number.  Casting that to `__int64`
and shifting left by 32bits triggers undefined behavior if the most
significant bit of `.nFileIndexHigh` is set.  We could avoid that by
casting to `(__uint64)`, but in that case the whole clause doesn't have
an effect anymore, so we drop it altogether.

Closes GH-9958.

2022-11-18 14:37:00 +01:00

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