Add -wnan switch to flag default NaN initializations

[Alexandru Ermicioi]

On Friday, 21 August 2026 at 08:03:46 UTC, Richard (Rikki) Andrew 
Cattermole wrote:
> They don't serve the same purpose, although they may appear the 
> same on the surface.
>
> Also nobody has asked for the ability to audit the locations 
> where this exists, like they did for TLS.

Still a bit better, than nothing right?