added access control for private projects wiki

git-svn-id: http://redmine.rubyforge.org/svn/branches/work@294 e93f8b46-1217-0410-a6f0-8f06a7374b81

wiki/app/controllers/wiki_controller.rb

@@ -17,7 +17,7 @@
 
 class WikiController < ApplicationController
   layout 'base'
-  before_filter :find_wiki
+  before_filter :find_wiki, :check_project_privacy
     
   # display a page (in editing mode if it doesn't exist)
   def index