Correctly flush database when re-creating game.dat.
Correctly flush database when re-creating game.dat.

Flush the DB environment before deleting & recreating game.dat, since
otherwise weird bugs due to caching appear.

domob1812/huntercoin,wiggi/huntercoin,fsb4000/huntercoin,wiggi/huntercoin,chronokings/huntercoin,chronokings/huntercoin,fsb4000/huntercoin,wiggi/huntercoin,domob1812/huntercoin,chronokings/huntercoin,domob1812/huntercoin,fsb4000/huntercoin,wiggi/huntercoin,domob1812/huntercoin,fsb4000/huntercoin,chronokings/huntercoin