Multibyte characters not properly parsed

[mcpcpc]

This issue was originally reported by via email:

When typing the 'ñ' caracter (we are using spanish keyboards), and then deleting it, an strange ? appears.
We tried to change the locales but did not fix the issue. Do you know why this happens?

Extended ASCII characters, such as ñ, ń, ë, are considered multibyte characters and are not fully supported in the current kirc implementation. The end result is an incorrect column shift (which is calculated when strlen() returns 2 instead of 1 for a 2-byte character).