Perf: don't load preferences for the anonymous user.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@9917 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/user.rb

@@ -659,6 +659,10 @@ class AnonymousUser < User
   def time_zone; nil end
   def rss_key; nil end
 
+  def pref
+    UserPreference.new(:user => self)
+  end
+
   # Anonymous user can not be destroyed
   def destroy
     false