gdi32: correct substitutions (take 2)

[Dmitry Timoshkov]

Rafał Mużyło <galtgendo at gmail.com> wrote:

> Corrected version of the previous patch.
> This time I'm not adding a new helper function, just putting it in one
> place.
> Corrections:
> - as oppossed to get_font_subst, reverse check can have more than one
>   result, so changed to adjust all of them
> - just in case a->a substitution would result, explicitly prevent that
> (perhaps gdi32 handles it gracefully, but it's still redundant)

Did you test that Windows handles font substitutions this way?

-- 
Dmitry.