1.6: Fix in error handling code

git-svn-id: http://plugins.svn.wordpress.org/wp-translation-box/trunk@821749 b8457f37-d9ea-0310-8a92-e5e31aec5664
Version history updated

git-svn-id: http://plugins.svn.wordpress.org/wp-translation-box/trunk@821776 b8457f37-d9ea-0310-8a92-e5e31aec5664