json_server.js has missing semicolon, possible stray comma, which cause problems for Javscript aggregation

json_server.js seems to have a missing semicolon after the "Drupal.service=..." line. This caused problems for me with Javascript aggregation enabled. The attach patch fixes this, and a comma which may be a stray. With these changes Javascript aggregation works fine.

Thanks for the module, it just saved me a ton of time on a project!