Fix display of last move of last match game

Fix display of last move of last match game

When a game was adjudicated (e.g. because XBoard detected mate) GameEnds
would trigger an exit if it was the last game of the match, and thus
never returned, while the ShowMove was called only after return from
Adjudicate. An extra ToNrEvent is now used in GameEnd in this case to
cause ShowMove to be called before exiting. (Ugly kludge...)