[Issue 21740] Typeof mixin regression with v2.096

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21740

--- Comment #7 from Boris Carvajal <boris2.9 at gmail.com> ---
The 'typeof' of any void expression should be 'void'.

The second case looks like another bug, why is the call expression "foo()", of
void value, changing to a function symbol.

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