fix clone_billing_address for new spree

app/models/spree/order_decorator.rb

@@ -6,15 +6,19 @@
   before_validation :clone_shipping_address, :if => "Spree::AddressBook::Config[:disable_bill_address]"
 
   def clone_shipping_address
-    if self.ship_address
-      self.bill_address = self.ship_address
+    if ship_address && bill_address.nil?
+      self.bill_address = ship_address.clone
+    else
+      bill_address.attributes = ship_address.attributes.except('id', 'updated_at', 'created_at')
     end
     true
   end
 
   def clone_billing_address
-    if self.bill_address
-      self.ship_address = self.bill_address
+    if bill_address && ship_address.nil?
+      self.ship_address = bill_address.clone
+    else
+      ship_address.attributes = bill_address.attributes.except('id', 'updated_at', 'created_at')
     end
     true
   end