Case where appSecretProof was calculated incorrectly

[jarrodconnolly]

When using FB.options to set both the appSecret and accessToken the appSecretProof was being calculated incorrectly. Essentially the appSecret gets passed as both parameters to the getAppSecretProof method.

This is how I am using the options.

FB.options( {appSecret: '', accessToken: ''} );
FB.api('me', 'get', function(res) {
  console.log(res);
});

[jarrodconnolly]

Any chance someone can have a look at this and get it merged in?