[sfFacebookConnectPlugin] avoid any IE6 error...
[sfFacebookConnectPlugin] avoid any IE6 error...

git-svn-id: 8bf30244cac7f210af08ef653903b56a8ef0c1af@22851 ee427ae8-e902-0410-961c-c3ed070cd9f9

Symfony-Plugins/sfFacebookConnectPlugin,Symfony-Plugins/sfFacebookConnectPlugin