Allowed to keep the second password intact on reactivating the plugin.

git-svn-id: https://plugins.svn.wordpress.org/wp-double-protection/trunk@1004539 b8457f37-d9ea-0310-8a92-e5e31aec5664
corrected the typo

git-svn-id: https://plugins.svn.wordpress.org/wp-double-protection/trunk@1004541 b8457f37-d9ea-0310-8a92-e5e31aec5664