pinchin/pinchout fire extraneous pinch events

[CaporalF]

Using this code on Chrome on a Windows 7 based PC with Touch Screen:

var myElement = document.getElementById('myElement');
var mc = new Hammer.Manager(myElement);
var pinch = new Hammer.Pinch({threshold: 0});
mc.add([pinch])
mc.on("pinch pinchin pinchout pinchstart pinchend", function(ev) {
myElement.textContent += ev.type +" ";
});

Results in this sequence:

pinchstart pinch pinchin pinch pinchin... ...pinch pinchin pinch pinchend pinchin

Note the trailing pinchin. The same happens with pinchout.