Using the wrong variable name in delete_post() function, in log.php was causing a "file does not exist" error, which did not allow the user to delete post files. Deleting a "not-updated" post file is now working correctly.

One more simpleXMLElement update because of the "using null instead of int" warning(see previous post), this time in data_connect.php.

Fixes available with the latest version MonoCMS22-20240103.