Makes parseInt have default radix of 10.

lazy_parse_int.js

// JSLint:
/*global window, _parseInt, parseInt*/

// Conditionally check value, in case
// future implementations of parseInt
// provide native base-10 by default.
if (window.parseInt('09') === 0) {
  window._parseInt = window.parseInt;

  window.parseInt = function(str, radix) {
    return window._parseInt(str, radix || 10);
  };
}