[Issue 19179] extern(C++) small-struct by-val uses wrong ABI

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19179

Manu <turkeyman at gmail.com> changed:

           What    |Removed                     |Added
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           Keywords|                            |C++, industry, wrong-code

--- Comment #1 from Manu <turkeyman at gmail.com> ---
Oops, my cut&paste removed the `extern(C++):` at the top of the D source.
Those 2 test functions should be extern(C++)!

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