Comment update

src/engine/wpakpowers/WpakPowerManager.java

@@ -432,7 +432,7 @@ public class WpakPowerManager {
         // use in the DD modifier.
 
         // MB Dev Note:
-        // A subset of health/mana/stam modifiers are additive.
+        // A subset of health/mana/stam modifiers are multiplicative.
         // These all have "SIVL" in the curve name suggesting
         // that SB interpolates between min max.