[Issue 20141] No builtin version which says if the platform is 64bit

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20141

--- Comment #1 from anonymous4 <dfj1esp02 at sneakemail.com> ---
Pointers are 32bit on x32, it's the sole purpose of x32.

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