New annotation, because of db switch to mysql.

Background: sqlite has some problems with decimal option.

test/fixtures/article_categories.yml

@@ -1,12 +1,3 @@
-# == Schema Information
-#
-# Table name: article_categories
-#
-#  id          :integer         not null, primary key
-#  name        :string(255)     default(""), not null
-#  description :string(255)
-#
-
 # Read about fixtures at http://ar.rubyonrails.org/classes/Fixtures.html
 fruits:
   name: Fruits
@@ -15,3 +6,13 @@ vegi:
   name: Vegetables
 other:
   name: Other stuff
+
+# == Schema Information
+#
+# Table name: article_categories
+#
+#  id          :integer(4)      not null, primary key
+#  name        :string(255)     default(""), not null
+#  description :string(255)
+#
+