Fixed: chained jQuery calls fail when trying to select States based on Country selection in Profiles

AJAX queries for civicrm/ajax/jqState were never executed causing JavaScript errors due to eval(data) expecting JSON but instead receiving HTML. As a result State drop-downs as a result of Country choices in jQuery.chainSelects don't get called.

Not clear why there isn't a simple curl based test that tries to retrieve JSON responses for calls to civicrm/ajax/jqState? This could have been easily caught in automated testing prior to release.

I'm also not certain that all edge cases are covered in this if statement and exiting with a return statement in the middle of an invoke step is flirting with more bugs.

Pull request with fix is here:
https://github.com/civicrm/civicrm-wordpress/pull/43