Optimize: Only select the name when getting the module names.

This has speed up TimelogController#details by 100% with larger databases
(demo.redmine went from 4077ms down to 2085ms).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3484 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/project.rb

@@ -639,7 +639,7 @@ class Project < ActiveRecord::Base
   
   def allowed_permissions
     @allowed_permissions ||= begin
-      module_names = enabled_modules.collect {|m| m.name}
+      module_names = enabled_modules.all(:select => :name).collect {|m| m.name}
       Redmine::AccessControl.modules_permissions(module_names).collect {|p| p.name}
     end
   end