Armor respects unblockable damage types

This fixes #966

src/main/java/vazkii/botania/common/item/equipment/armor/manasteel/ItemManasteelArmor.java

@@ -74,6 +74,8 @@ public class ItemManasteelArmor extends ItemArmor implements ISpecialArmor, IMan
 
 	@Override
 	public ArmorProperties getProperties(EntityLivingBase player, ItemStack armor, DamageSource source, double damage, int slot) {
+		if (source.isUnblockable())
+                    return new ArmorProperties(0, 0, 0);
 		return new ArmorProperties(0, damageReduceAmount / 25D, armor.getMaxDamage() + 1 - armor.getItemDamage());
 	}