0.11.834 self-burying corpses

[lewinthistle]

Steps to reproduce:
- Dig a grave. Don't fill it.
- Hunt an animal. (Example: a hare)
- Kill the animal while it's right on top of the grave.

Expected outcome:
- Rabbit dinner ready to be brought home for butchering

Actual outcome:
- Rabbit gets instantly buried in the grave, and colonists go hungry.

[Shinzy]

https://ludeon.com/forums/index.php?topic=13970.msg144092#msg144092

also don't use graves! butcher everything!