Fixed a notice when course->modinfo is empty

diff --git a/lib/datalib.php b/lib/datalib.php
index b2de1936b1d4e101faf1c8917640576528e839f7..a56e3e1e1a56ea6692910f558953d43780de19cf 100644 (file)
--- a/lib/datalib.php
+++ b/lib/datalib.php
@@ -1112,7 +1112,10 @@ function get_all_instances_in_course($modulename, $course) {
 
     global $CFG;
 
-/// Casting $course->modinfo to string prevents one notice when the field is null
+    if (empty($course->modinfo)) {
+        return array();
+    }
+
     if (!$modinfo = unserialize((string)$course->modinfo)) {
         return array();
     }