Remove button can't destroy window/door houses

Alpha 4, Build 114

Summary: When building a house, if you put windows and doors on the house and attempt to remove the house by selecting a piece of it (I.e. I selected the roof), and clicking the remove button that appears, you’ll get a lua runtime error, trying to call the set_teardown function. However, if you click remove enough times, the house will eventually remove itself piece by piece.

Steps to reproduce:

  1. Design a house with windows and doors, but don’t build.
  2. Click on a section of the house, the roof seems to work best.
  3. Click the Remove button that appears until you get the error message.