Fixed bug order.profit calculation.

Order.profit will also be saved, when order is closed.

test/unit/stock_change_test.rb

@@ -1,3 +1,17 @@
+# == Schema Information
+# Schema version: 20090317175355
+#
+# Table name: stock_changes
+#
+#  id               :integer         not null, primary key
+#  delivery_id      :integer
+#  order_id         :integer
+#  stock_article_id :integer
+#  quantity         :integer         default(0)
+#  created_at       :datetime
+#  stock_taking_id  :integer
+#
+
 require 'test_helper'
 
 class StockChangeTest < ActiveSupport::TestCase