Small fix and change to clover. I'm aware of an issue where flowers from this mod won't appear via bonemealing an area, but I'm not having luck with a fix. 

• (Hopefully) fixed a bug causing players to be kicked from worlds due to invalid player data upon first joining (again).
• Restricted clover patches to birch, taiga, and meadow biomes.
• Made Four Leaf Clover drops significantly more rare.