allow negative values for monster's AC

[igroglaz]

eg I've tried to assign negative value to armor-class:-10 for poly form, but it doesn't change character AC..

so atm AC from forms could only be positive value, as having low form AC doesn't effect overal AC.. there could be two approaches:

1. HP-way: ([20:29] PowerWyrm: hp formula = 60% of char hp + 40% of form hp)
2. allow negative values
3. use both approaches (best)

==

PW: Polymorphed ac is calculated as follows:

• if form ac is greater than equipment ac, we take the average of the two
• if form ac is lower, we take the equipment value
  So putting negative values will have no effect. Low form ac has effect at the beginning when player ac is low, and that's how it should be.

T: yep, I know that, thanks :) the ticket was about possibility to assign negative values there. Because right now there are not enough ways to rebalance poly races. We need more malus factors. Atm there are only HP (which is bad factor as for some classes form will give too much hp, while for others too small), speed, -STEALTH (weight), -INT (smart and spell freq)... and HURT_FIRE, COLD, LIGHT. We near moar negative (malus) factors for the scales ⚖️