#99 Don't delete rewind saves when loading a save state.

[Doug Hoskisson]

In Zsnes, the rewind function is very useful when you
accidently load a save state when you don't want to.
You can use the rewind button to go back to the spot in
the game that you were at. Now that doesn't work in
VBA, because when you load a state, all the rewind
states are erased.
Please make it not delete the rewind states when
loading a save state.