FQL count(*) Javascript SDK doesn't work
===

I use a fql request to find all my friends who use my application and want to see my film. I use this request : 

FB.api({
	method: "fql.query",
	query: "SELECT actor_id FROM stream WHERE app_id = MYAPPID and source_id = "+friend.id+" and attachment.name = 'MYFILMNAME'"
					}, function (responseFQL) {


This returns all friends ids. But i want to count the number of results, how can i do simply ? I can't use count(*) in FQL ?

Thanks !
