Emscripten: index.json handling broken for Turkish locale

[Ghabry]

I'm not fully sure how this happens yet but I guess Emscripten passes in the locale of the browser as the C locale because the normalization happens in ICU.

When running the web player in a browser that has a turkish locale set then "I" will be lowercased to "ı" instead of "i". (Unicode is fun)

This makes the lookup in index.json fail because this is the wrong "i".

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Not tested in non-web players yet. There this goes likely unnoticed because when everything is lowercased to "ı" it will just work.

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Guess this could be solved by passing a specific locale to icu::UnicodeString uni = icu::UnicodeString(str.data(), str.length(), "utf-8").toLower(); in liblcf (making this a liblcf bug that only matters on the Player side)

[carstene1ns]

I remember we needed this in gencache as well:
https://github.com/EasyRPG/Tools/blob/master/gencache/src/main.cpp#L79

[Ghabry]

indeed gencache has the same bug and this is great for testing :)