[Issue 15959] core.sys.windows modules should be modified for x64

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15959

--- Comment #7 from github-bugzilla at puremagic.com ---
Commit pushed to master at https://github.com/dlang/druntime

https://github.com/dlang/druntime/commit/fa93b0b2ac3214f020c7f96859c5dcfd61fbff9b
Merge pull request #1575 from qchikara/pr-size_t

More fix of issue 15959 (size_t)

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