use 3D range check for mob attacks

src/engine/mobileAI/Behaviours/StandardMob.java

@@ -234,7 +234,7 @@ public class StandardMob {
         ItemBase mainHand = mob.getWeaponItemBase(true);
         ItemBase offHand = mob.getWeaponItemBase(false);
 
-        if(!CombatUtilities.inRange2D(mob,mob.combatTarget,mob.getRange()))
+        if(!CombatUtilities.inRangeToAttack(mob,mob.combatTarget))
             return;
 
         InterestManager.setObjectDirty(mob);