Fixed a bug in the highscore dialog.
If you opened it with some tabs and then closed it and played a game of a group that was NOT one of these tabs, if you won, the the dialog and the game crashed... -> not nice.

However, I discovered other serious bugs in this dialog like:
- wrong tag displayed ( -> not the one where you have to type your name!...)
- click on "Close" before "Enter" do not save the highscore
And I'm not writing about the wanted improvements... -> A lot of work for KDE 4.1! ,o)