Shopkeepers don't charge for reading scrolls

[Grond]

Unlike with food and potions, consuming unpaid scrolls by reading them does not add anything to your tab.

[adom-admin]

Fixed for ADOM II 0.3.1. Please send your real name to creator(at)ancientdomainsofmystery.com for it to be included in the credits. (If you were already asked to do so you can ignore this message. Please include a reference to the bug or RFE you are credited for.)