Better check for empty lastfmtype - Bug squashed.

git-svn-id: https://plugins.svn.wordpress.org/8tracks-shortcode/trunk@1050062 b8457f37-d9ea-0310-8a92-e5e31aec5664
Version bump.

git-svn-id: https://plugins.svn.wordpress.org/8tracks-shortcode/trunk@1050065 b8457f37-d9ea-0310-8a92-e5e31aec5664