New annotation, because of db switch to mysql.

Background: sqlite has some problems with decimal option.

test/fixtures/stock_changes.yml

@@ -1,14 +1,15 @@
+# Read about fixtures at http://ar.rubyonrails.org/classes/Fixtures.html
+
 # == Schema Information
 #
 # Table name: stock_changes
 #
-#  id               :integer         not null, primary key
-#  delivery_id      :integer
-#  order_id         :integer
-#  stock_article_id :integer
-#  quantity         :integer         default(0)
+#  id               :integer(4)      not null, primary key
+#  delivery_id      :integer(4)
+#  order_id         :integer(4)
+#  stock_article_id :integer(4)
+#  quantity         :integer(4)      default(0)
 #  created_at       :datetime
-#  stock_taking_id  :integer
+#  stock_taking_id  :integer(4)
 #
 
-# Read about fixtures at http://ar.rubyonrails.org/classes/Fixtures.html