bug#3181: 23.0.92; Windows: text-scale-decrease changes font family, not just font size

[Jason Rumney]

Eric Hanchrow wrote:
> I started Emacs with -Q.
>
> I noted with pleasure that the displayed font was Courier, which I
> like because it's monospaced.
>
> I shift-left-clicked in the middle of the screen, and chose "decrease
> buffer text size" from the menu that appeared.
>
> I noticed that the font was now .. I dunno ... Ariel, I guess;
> whatever it is, it ain't Courier and it ain't monospaced.  (It was,
> however, smaller than what I'd started with, so that's something.)
>   

Please type C-u C-x = before and after decreasing the font size, and 
report exactly what fonts are used in each case.

> For what it's worth, no similar problem happens on *nix, with an emacs as of
>   

No similar problem happens on Windows here either, but if your original 
font really is the bitmap font "Courier" and not the scalable font 
"Courier New", then the problem might be that the original font is not 
available in the smaller size. If so, then it is probably possible to 
reproduce the bug on X using a non-scalable font.