Fixed serious bug which resulted in corruption of stored CPT form data.

git-svn-id: https://plugins.svn.wordpress.org/wpgform/trunk@858002 b8457f37-d9ea-0310-8a92-e5e31aec5664
Prep for v0.64 release.

git-svn-id: https://plugins.svn.wordpress.org/wpgform/trunk@858003 b8457f37-d9ea-0310-8a92-e5e31aec5664