Small patch to improve save/load function.

This patch is a potential fix for corrupted save files (empty house) being generated sometimes for some players. We haven't been able to reproduce the issue in our testing environment, but we have been analyzing our code closely to identify what could be causing the issue. This patch will not fix save files that have already been corrupted, but it we hope it will prevent the creation of corrupted save files going forward. This patch may also improve performance of some older saves (pre 1.3.0), although saves from 1.3.0 forward are still recommended for the best experience with the new system.