iOS scaling bug fix

// iOS scaling bug fix// Rewritten version// By @mathias, @cheeaun and @jdalton// Source url: https://gist.github.com/901295(function(doc) {    var addEvent = 'addEventListener',    type = 'gesturestart',    qsa = 'querySelectorAll',    scales = [1, 1],    meta = qsa in doc ? doc[qsa]('meta[name=viewport]') : [];    function fix() {        meta.content = 'width=device-width,minimum-scale=' + scales[0] + ',maximum-scale=' + scales[1];        doc.removeEventListener(type, fix, true);    }    if ((meta = meta[meta.length - 1]) && addEvent in doc) {        fix();        scales = [0.25, 1.6];        doc[addEvent](type, fix, true);    }}(document));