Error when target post is deleted + fix

If there’s a rule for which its target post is deleted, an error occurs when some tries to edit the rule. The reason is a NULL variable passed to a function in the query.php. Here’s a fix:

/seo-automated-link-building/vendor/friedolinfoerder/wp-activerecord/src/Query.php line 484

    /**
     * Get the row of the query
     *
     * @return \stdClass The row as an object
     */
    public function get_row() {
        $row = $this->get_raw_row();
        
        if ($row == NULL) {
          return [];
        }
      
        return $this->get_casted_row($row);
    }