Loading Village.dat containing player reputation causes NullPointerException

Once a player has a reputation written to villages.dat, that file will fail to load. Instead it will cause a NullPointerException during startup and every village with player reputation will be removed from the file.

Steps to Reproduce:

• Create or find a village
• Kill a villager belonging to that village
• Restart the server
• Notice the NullPointerException on startup while loading villages.dat

Removing all player reputation from villages.dat and restarting fixes the exception.