Automatic inhabitant houses, while save/load without resources

[stubb]

Reproducable by level up to increment 3 without having bricks. Save the game and load it again, all wooden increment 2 houses are replaced by increment 3 houses, without having paied the resources already. But the correct inhabitant needs are still available.

You can use the attached savegame.

> Link to originally reported Trac ticket < Attachment: quicksave-1332207762.3262--2012-03-20--02-42.sqlite

[stubb]

Duplicate of #1592

[ChrisOelmueller]

Attachment uploaded by stubb: quicksave-1332207762.3262--2012-03-20--02-42.sqlite