Bug in stdlib.js xtools 2.3

[Andriy Astakhov]

Line 961:

if (!Array.prototype.lastIndexOf) {
  Array.prototype.indexOf = function(el) {
    for (var i = this.length-1; i >= 0; i--) {
      if (this[i] == el) {
        return i;
      }
    }
  return -1;
  };
}

I believe 2nd string should be:

 Array.prototype.lastIndexOf = function(el) {