Bloody curse patch.

  This patch is ready to be aplied to Vanilla angband 2.9.5-alpha

  It adds a new item flag : TR3_BLOODY_CURSE
replacing the (I hope) unnused flag : TR3_XXX3

  Objects to get this flag should get marked with BLOODY_CURSE at
edit/object.txt
  But only weapons should get this flag.

  When the player wields an item with this flag he will not be able
to wield another weapon (or take this off) till he destroys pval*500
monsters. All ways of destroying monsters (with the possible exception
of genocide) count for this curse. This curse can not be removed and
gets reactivated if it is taken of and then wielded.
  Which objects should get this curse is up to the mantainer and users.
  I would suggest Gurthang (Turin Turambar's sword) to get this flag.

TO DO:
  Wizard mode commands do not know about this flag.
  The weapons could get thirsty, so the amount of needed kills could
increase over time.

Luthien
josedura@wanadoo.es