Highscore bugfix for WHDload versions

While watching Amiga Cammy's stream of playing Sky Shapers we were shocked to see that the game crashed when saving a new highscore to disk, prompting us to immediately fire the entire QA team.

Unfortunately there was a bug in the WHDload versions that caused Sky Shapers to crash every time it tried to write a new highscore to disk. A fix has been uploaded for the WHDload versions.

Also a note for A500mini version, as it contain a custom uae config file do not enter the "game settings" menu from A500mini, as it will overwrite the config file and remove the custom memory settings, resulting in very long loading times. 

Now on to hire some new QA testers..