Video onComplete function is called multiple times

[ramalhovfc]

Video onComplete added functions are called multiples times when video playback ends. This is because a bind() is called on the function passed to removeEventListener. Because bind always returns a new function, the system can not find (and remove) the previous event listeners. The functions added to the onComplete signal will be called the same number of times that the video plays (first time: one; second time: two...).

To reproduce the problem paste the following code in a phaser example page,for example: http://phaser.io/examples/v2/video/alpha-webm

var game = new Phaser.Game(800, 600, Phaser.CANVAS, 'phaser-example', { preload: preload, create: create });
function preload() {
game.load.video('space', 'assets/video/alpha-webm.webm');
}
var video;
function create() {
video = game.add.video('space');
video.onComplete.add(function() {alert('On complete called'); video.play();});
video.play();
video.addToWorld(400, 300, 0.5, 0.5);
}

[photonstorm]

Thanks for the PR. I can't merge because it's against the wrong branch, but have made the changes locally.