Tents: fix bias in tent placement.

In the very first stage of game generation, we're supposed to pick 1/5
of the grid squares to put tents in, in a uniformly random manner. It
failed to be uniform, because I had the wrong limit in random_upto -
but it was too small rather than too large, so it never overran the
buffer in a way that something like ASan or valgrind would have caught.

0 files changed, 0 insertions, 0 deletions