[CF-Devel] Improvement needed on artifact selection code?

[Peter Mardahl]

Hello,

  I recently added a bunch of rings oriented for fighters,
which grant fighting stats at the expense of magic abilities.

  These rings are popular among the masses, and unfortunately,
they're common.

  For some reason, a Ring of Thieves, for example, comes up
more often than a Ring of Halvor.

Thieves has a chance of 20
Halvor has a chance of 50

Therefore, you should see 2.5 rings of halvor for every ring
of thieves.  Instead, you see more rings of thieves.