Text formatting drop down disabled if RedCloth is not available (system settings).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@497 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/settings_controller.rb

@@ -29,5 +29,6 @@ class SettingsController < ApplicationController
       params[:settings].each { |name, value| Setting[name] = value }
       redirect_to :action => 'edit' and return
     end
+    @textile_available = ActionView::Helpers::TextHelper.method_defined?("textilize")
   end
 end