Problem
Missiles can be shot while blind, but if you're under darkness you can't because "it is too dark to shoot at anything", despite the fact you already couldn't see.

How to reproduce it
1. Equip some missiles with their respective weapon if necessary.
2. Drink a potion of blindness.
3. Try to 't'arget something, and you'll be able to.
4. Create darkness using a crystal or the spell.
5. Try to 't'arget something, and the game will give the above excuse.

Notes
Either the PC should be allowed to shoot in the dark, or also disallowed while blind.