Add missing function - fix fatal error.

main/inc/lib/api.lib.php

@@ -8076,3 +8076,17 @@ function apiIsSystemInstalled()
     $version = $settingsRow['selected_value'];
     return array('installed' => 1, 'message' => $version);
 }
+
+/**
+ * Limit the access to Session Admins wheen the limit_session_admin_role
+ * configuration variable is set to true
+ */
+function api_protect_limit_for_session_admin()
+{
+    if (
+        api_is_session_admin() &&
+        api_get_configuration_value('limit_session_admin_role')
+    ) {
+        api_not_allowed(true);
+    }
+}