edx/edx-platform — pull request #1384 by flowerhack (2013-10-17 16:26:19+00:00)
Title: Fixed LMS-1062

If you chose to register for a course using audit/honors certificate option, then went back to the "choose track" link in your history, you were able to register for the course a second time, despite already having been registered.

Now, if you are registered for a course already, you are redirected to the courseware page.

@dianakhuang @ormsbee