If you opened the fast travel or the item menu right before touching a
touch-run event, it would soft-lock you if the event changed niko's
move-route, since niko was unable to move due to his update function
being unreached.
This was causing footsteps tiles in the barrens to allow the player to
interact with objects an extra tile in front of them, which was causing
issues (ex: letting players talk to doors through walls)
With this, autoloading upon launching the game should be fully working.
Also added some randomness to the pitch of step_sfx to make them sound a
bit less repetitive, and made it so the game can only save if the
current scene is a Scene_Map (because auto_saving at the titlescreen
breaks things pretty badly).
