Wrong callback reference in login-link.js

[mfmpittau]

The typeof refers to fn instead of callback:

  if (typeof fn === 'function') {
      callback(response);
  }

It would be nice to get back in the callback, also the element that triggered the event

  if (typeof callback === 'function') {
      callback(response, event.target);
  }

[benorama]

Indeed, I've incorporated your change. It will be able in 0.4.7 released next week.

Thanks!