[Issue 18148] Integral Promotion Fix For 16997 Should Issue Deprecation, Not A Warning

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18148

--- Comment #2 from Jack Stouffer <jack at jackstouffer.com> ---
(In reply to Steven Schveighoffer from comment #1)
> Fixed typo in title.
> 
> Reading all the history for 16997, it appears that the resulting intent was
> for it to be a deprecation. Specifically this comment from Walter:
> https://github.com/dlang/dmd/pull/7013#issuecomment-338364465
> 
> Is it not true?

According to the changelog a warning is issued if one of the switches is not
given https://dlang.org/changelog/2.078.0.html#fix16997

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