Save game landscape corruption bug

Due to unexpected side effects from changes I made in version 1.0.10, landscapes from earlier versions now load wrong. This includes landscapes in saved games, saved combats, and missions. If you see floating islands made out of weird tree bits, that's why. I will see that I can rectify this problem as quickly as possible.

Again, my apologies. I'll do my best to push out an update that will load things correctly.