Does not work with recent media module dev versions

From what I can tell, EPSA crop stopped working with some recent media module dev versions. The error is on line 25 of epsacrop-media.js where it tries to inspect fileInfo.fid, which does not exist. The problem is that on line 22, it does:

var elem = $(this).parent();

But, at least in the HTML on my site, this does not return the element containing the ID attribute. The attached patch changes this line to read:

var elem = $(this).parents('.media-widget');

This will be sure that it grabs the parent element with the .media-widget class, which is the element that will have the ID attribute that epsacrop needs.