No sound under Wine

[toneomgomg]

Problem:
Several distributions of Linux will not play mp3-files when running AutoIt under Wine.

Solution:
Change sound format to wav-files.

[ktzee]

@toneomgomg thanks for figuring this out. Would it be possible to get a build with your PR, so I can test it?

[ktzee]

nvm, I built in a vm. It does work indeed. Your PR is on top of an older version of d2-stats though. I'll try submitting a new based on the latest.

[toneomgomg]

I no longer play d2. Feel free to use assets/fix from this pr on top of newer sources, as it solves a problem for Linux users. :)

[ktzee]

@toneomgomg thank you. I've submitted a new PR with the same fix, but based on the latest version.