MDL-55255 mod_data: prevent direct script access to lib files.

mod/data/lib.php

@@ -21,6 +21,8 @@
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die();
+
 // Some constants
 define ('DATA_MAX_ENTRIES', 50);
 define ('DATA_PERPAGE_SINGLE', 1);

mod/data/locallib.php

@@ -21,6 +21,8 @@
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die();
+
 require_once($CFG->dirroot . '/mod/data/lib.php');
 require_once($CFG->libdir . '/portfolio/caller.php');
 require_once($CFG->libdir . '/filelib.php');

mod/data/rsslib.php

@@ -25,6 +25,8 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die();
+
 /**
  * Generates the Database modules RSS Feed
  *