MDL-32709 book: Add some missing MOODLE_INTERNALs

mod/book/backup/moodle2/restore_book_stepslib.php

@@ -23,6 +23,8 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die;
+
 /**
  * Structure step to restore one book activity
  */

mod/book/tool/exportimscp/db/access.php

@@ -22,6 +22,8 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die;
+
 $capabilities = array(
     'booktool/exportimscp:export' => array(
         'captype' => 'read',

mod/book/tool/importhtml/db/access.php

@@ -22,6 +22,8 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die;
+
 $capabilities = array(
     'booktool/importhtml:import' => array(
         'riskbitmask' => RISK_XSS,

mod/book/tool/print/db/access.php

@@ -22,6 +22,8 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die;
+
 $capabilities = array(
     'booktool/print:print' => array(
         'captype' => 'read',