Dither intensity does not work properly in version 1.14.3

[veltza]

I prefer to use dithering with sixels because it prevents color banding. But I noticed that the new version 1.14.3 no longer accepts decimal numbers in the dither intensity.

> chafa -f sixels --dither ordered --dither-intensity 0.85 26039de5.jpg
chafa: Dither intensity must be a positive real number or fraction.
> 
> chafa --version                                                     
Chafa version 1.14.3

Loaders:  GIF JPEG PNG QOI SVG TIFF WebP XWD
Features: mmx sse4.1 popcnt avx2
Applying: mmx sse4.1 popcnt avx2

Copyright (C) 2018-2023 Hans Petter Jansson et al.
Incl. libnsgif copyright (C) 2004 Richard Wilson, copyright (C) 2008 Sean Fox
Incl. LodePNG copyright (C) 2005-2018 Lode Vandevenne
Incl. QOI decoder copyright (C) 2021 Dominic Szablewski

This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

I used the stand-alone executable here, but the same thing happened when I compiled it from the source.

[hpjansson]

Ah, looks like this is just scanf() being broken. I'll issue a fixed release asap. Out of curiosity, are you on Windows or Linux? Do you have a non-US locale set? If so, you may be able to work around it by using the decimal separator prescribed by your locale (e.g. in the Norwegian locale it's ,).

[veltza]

Your guess was right, my locale uses a comma as a decimal separator. It didn't occur to me to try it because it also worked with the dot before.

[hpjansson]

The fix is in 1.14.4. Thanks for pointing out the problem!