Optimistic locking added for wiki edits.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@545 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/wiki_content.rb

@@ -18,6 +18,7 @@
 require 'zlib'
 
 class WikiContent < ActiveRecord::Base
+  set_locking_column :version
   belongs_to :page, :class_name => 'WikiPage', :foreign_key => 'page_id'
   belongs_to :author, :class_name => 'User', :foreign_key => 'author_id'
   validates_presence_of :text