Comment 4 for bug 1171233

I've pushed a fix for it.
But i think, widelands behaves a bit weird:
- you can't set a working dir in the registry for the app, the app should be able to run without it
- setting --datadir is not necessary, when set it does not get saved to config file
- setting --localedir gets saved to widelands config file

In my opinion widelands should always look for data/language files relative to it's own executable when no values are set by commandline or config file.