DiplayCalibrator.app in german l10n doesn't work

I don't know who to tell this. Gürkan?

DiplayCalibrator.app does not work correctly in german environment (in my case
LANG=de_DE.UTF-8 but I think this concerns most european l10ns), as it
(respectively snprintf) is so "clever" to deliver the gamma values in the form
"x,y" whilst xgamma is so "dumb" that it expects them to be "x.y" regardless of
the language settings.

BTW what is the licensing of DiplayCalibrator.app? I am playing with the idea to
make a panel for SystemPreferences.app out of it.

Ingolf