0.5.1 Hotfix

An invalid data error was causing a nasty crash in 0.5.0. It managed to evade detection due to an old savegame that happened to have the right data saved before the errant line of code was written. Confusing, isn't it?

Moral of the story? Always test new filesystem stuff with a blank directory.

Changelog:

- Fixed crash when creating a new save
- Widened map zoom limits