Revert "Update issue 3682: deactivate moodbar generation for wma files on Windows until we find a proper way to fix this issue."
This is not needed anymore now issue 3682 is fixed.

This reverts commit c9be07f508947043288a7631c9dcab7e4a88b09c.
Don't return a free'd pointer from Echonest::ParseError::what().  Might fix a crash on Windows when there are no echonest results.
Merge branch 'master' of https://code.google.com/p/clementine-player