Fix regressions in end-game tile management.

My end-game management was working fine for the case
I had been trying most...unknown racks and blind exchanges.
But I forgot to prevent regular exchanges from depleting the
overall tile counts.  And I didn't realize that this code might
be called with a clipped history, due to the way that the
computer players can clone game boards for simulations.

I think this fixes all of the problems I introduced, while keeping
the endgame tile counts correct in the unknown racks case.

0 files changed, 0 insertions, 0 deletions