Villages can generate one block up in the 'Snowy Kingdom' superflat world preset

Villages seem to be able to generate 1 block up in Snowy Kingdom Superflat worlds. This will make the structure pieces (like houses, include the snow layers around them) will appear to float above the ground.

Seed: 34521352 

Steps to reproduce:

1. Create a world with Superflat preset Snowy Kingdom with seed 34521352
2. Go to the nearest village
3. Notice the village is 1 block up than usual