Fix the upgrade

git-svn-id: https://plugins.svn.wordpress.org/restaurant-manager/trunk@1025785 b8457f37-d9ea-0310-8a92-e5e31aec5664
quick fix for update

git-svn-id: https://plugins.svn.wordpress.org/restaurant-manager/trunk@1025786 b8457f37-d9ea-0310-8a92-e5e31aec5664