[Issue 23647] Better error message on untyped function parameter

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23647

Basile-z <b2.temp at gmx.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
                 CC|                            |b2.temp at gmx.com
         Resolution|---                         |INVALID

--- Comment #1 from Basile-z <b2.temp at gmx.com> ---
`j` is well a type but it is resolved to nothing. So the parameter is not
untyped, it's unamed.

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