Script loaded with HeadJS runs only on second click

Script loaded with HeadJS runs only on second click. How to get Aviary launcher on first click?

http://jsfiddle.net/ynts/6hgEb/

function aviary(id, src) {
    var $id = id;
    var $src = src;

    head.load(
        "http://feather.aviary.com/js/feather.js",
        function() {

            var featherEditor = new Aviary.Feather({
                apiKey: 12345,
                apiVersion: 3

                // ... ///
            });

            featherEditor.launch({
                image: $id,


                  url: $src
                });
            }
        ); 
}

$(document).on('click', 'img', function(){
    var $img = $(this).attr('src');
    aviary('edit-pic', $img);
}); 

You need to wait for the plugin to initialize, before calling the launch function. There is onLoad event you can use:

var featherEditor = new Aviary.Feather({
                apiKey: 12345,
                apiVersion: 3,
                onLoad: function() {
                     featherEditor.launch({
                        image: $id,
                        url: $src
                    });
                }                                    
            });