Gnome Games 2.24.3

Just a few more fixups; nothing big.

All games:
- Change GGZ language from hardcoded en_NZ.UTF-8 to use environment variable
LANG (Robert Ancell, Bug #565402)

GLChess:
- Fix UI bug when players join a room (Robert Ancell)
- Catch keyboard interrupts in AI monitor process (Robert Ancell)

Translations:
Mario Blättermann, dnylande
_______________________________________________