Fix function doc, use correct cast int.

main/inc/lib/api.lib.php

@@ -2121,7 +2121,7 @@ function api_set_anonymous() {
  */
 function api_get_session_id()
 {
-    return Session::read('id_session', 0);
+    return (int) Session::read('id_session', 0);
 }
 
 /**

main/lp/learnpath.class.php

@@ -2610,7 +2610,7 @@ class learnpath
 
     /**
      * Gets the learnpath session id
-     * @return	string	Learnpath theme
+     * @return int
      */
     public function get_lp_session_id()
     {
@@ -2618,7 +2618,7 @@ class learnpath
             error_log('New LP - In learnpath::get_lp_session_id()', 0);
         }
         if (!empty ($this->lp_session_id)) {
-            return $this->lp_session_id;
+            return (int) $this->lp_session_id;
         } else {
             return 0;
         }

main/lp/lp_add_item.php

@@ -29,7 +29,6 @@ $is_allowed_to_edit = api_is_allowed_to_edit(null, false);
 
 $listUrl = api_get_path(WEB_CODE_PATH).'lp/lp_controller.php?action=view&lp_id='.$learnpath_id.'&'.api_get_cidreq().'&isStudentView=true';
 if (!$is_allowed_to_edit) {
-    error_log('New LP - User not authorized in lp_add_item.php');
     header("Location: $listUrl");
     exit;
 }
@@ -41,10 +40,9 @@ if (empty($learnPath)) {
     api_not_allowed();
 }
 
-if ((int)$learnPath->get_lp_session_id() != (int)api_get_session_id()) {
+if ($learnPath->get_lp_session_id() != api_get_session_id()) {
     // You cannot edit an LP from a base course.
     header("Location: $listUrl");
-
     exit;
 }