Automatic file name suffix doesn't work with Scandinavian characters

[Xenakios]

If the manually given file name (via the save dialog) has Scandinavian characters, like ä/Ä or ö/Ö, Recorder won't generate new files names with the -001 etc suffixes when starting a new recording when the option to generate the file names with the suffixes is enabled. Instead the previously recorded file is overwritten. The file is actually written on disk with the special characters in the file name included. This seems to be a problem in the code that detects the need for and generates the new automatic file names.

It also happens with German and French etc non-ASCII characters (like Ü/ü and à/è/ì/ò/ù).

I observed this on Windows 7.