Do not show 'Send information' checkbox if email delivery is not configured.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@6167 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/application_helper.rb

@@ -871,6 +871,10 @@ module ApplicationHelper
   def has_content?(name)
     (@has_content && @has_content[name]) || false
   end
+  
+  def email_delivery_enabled?
+    !!ActionMailer::Base.perform_deliveries
+  end
 
   # Returns the avatar image tag for the given +user+ if avatars are enabled
   # +user+ can be a User or a string that will be scanned for an email address (eg. 'joe <joe@foo.bar>')