Build 26596655

Fixes

Fixed a building issue in older saves. In some earlier versions a corner stone could be placed before the bricks inside it, which hid those bricks. A building could then say a few pieces were left without showing where they go. When you load such a save, those corner stones (and anything resting only on them) are taken down, so the missing bricks show again. Lay the bricks, then put the corner stones back to finish the building.