[sfAdminDashPlugin] minor speed improvement
[sfAdminDashPlugin] minor speed improvement

git-svn-id: 44246269cfc38a271b6242419949c997bae221fc@24363 ee427ae8-e902-0410-961c-c3ed070cd9f9

Symfony-Plugins/sfAdminDashPlugin,Symfony-Plugins/sfAdminDashPlugin