Handle close login popup event

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Login popup come out 
2. User click on CANCEL or close the popup

What is the expected output? What do you see instead?
- I expect that facebook-api handle this events and return some fail 
object/message
- Instead, the popup still re-open itself till the user log in fb or till I 
close my application.

What version of the product are you using? On what operating system?
Windows 7, GraphAPI 1.8.1

Please provide any additional information below.
My handle login function is:

        private function handleLogin(result:Object, fail:Object):void
        {
                if (result != null) {
                    // some stuff                        
                } else {
                     // nothing
                }           
        }

Original issue reported on code.google.com by marcono...@gmail.com on 27 Mar 2012 at 6:53