[for 0.9] Fix old save loading

This partially addresses loading some old saves, but I can't find a way to make it totally generic.
Some saves (https://drive.google.com/file/d/0B2KpFWC2n0CaZ3FUTkZOZi01Vm8/edit?usp=sharing) seems to have been generated with a save file version of 5, but wrote out as if it were version 4 format.  If this happens, the user has to set the player.sav version to 4, then it should load.
If someone can find a better solution than this I'd be grateful.