New annotation, because of db switch to mysql.

Background: sqlite has some problems with decimal option.

test/fixtures/order_comments.yml

@@ -1,12 +1,13 @@
+# Read about fixtures at http://ar.rubyonrails.org/classes/Fixtures.html
+
 # == Schema Information
 #
 # Table name: order_comments
 #
-#  id         :integer         not null, primary key
-#  order_id   :integer
-#  user_id    :integer
+#  id         :integer(4)      not null, primary key
+#  order_id   :integer(4)
+#  user_id    :integer(4)
 #  text       :text
 #  created_at :datetime
 #
 
-# Read about fixtures at http://ar.rubyonrails.org/classes/Fixtures.html