MDL-55557 mod_wiki: Add missing MOODLE_INTERNAL checks

mod/wiki/create_form.php

@@ -24,6 +24,8 @@
  * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die();
+
 require_once($CFG->libdir.'/formslib.php');
 
 class mod_wiki_create_form extends moodleform {

mod/wiki/lib.php

@@ -34,6 +34,8 @@
  * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die();
+
 /**
  * Given an object containing all the necessary data,
  * (defined by the form in mod.html) this function

mod/wiki/locallib.php

@@ -32,6 +32,8 @@
  * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die();
+
 require_once($CFG->dirroot . '/mod/wiki/lib.php');
 require_once($CFG->dirroot . '/mod/wiki/parser/parser.php');
 require_once($CFG->libdir . '/filelib.php');

mod/wiki/pagelib.php

@@ -33,6 +33,8 @@
  * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die();
+
 require_once($CFG->dirroot . '/mod/wiki/edit_form.php');
 
 /**