Save poweroff fallback feature (old feature missing)

[riggles1]

With the old alt64 firmware, if you were to power off the console or if the game froze to where you had to power it off, the save would be restored to the save prior to this happening. As it is right now it'll initialize your save if you power the system off and on.
The SD Save backup is nice, but the automatic way in alt64 is convenient. Especially for sessions where you don't want to save and just power off the system.

I know the N64FlashcartMenu is on the horizon for these clone carts, but altra64 is still solid and a good alternative with a progressive video menu.