Merge pull request #2326 from Capostrophic/regression

Fix zero division in enchantment magnitude calculation

apps/openmw/mwworld/inventorystore.cpp

@@ -644,6 +644,7 @@ void MWWorld::InventoryStore::updateMagicEffects(const Ptr& actor)
                 {
                     int delta = effect.mMagnMax - effect.mMagnMin;
                     // Roll some dice, one for each effect
+                    if (delta)
                         params[i].mRandom = Misc::Rng::rollDice(delta + 1) / static_cast<float>(delta);
                     // Try resisting each effect
                     params[i].mMultiplier = MWMechanics::getEffectMultiplier(effect.mEffectID, actor, actor);