MDL-14564 pg null trouble fixed by David Mudrak; merged from MOODLE_18_STABLE

diff --git a/mod/assignment/lib.php b/mod/assignment/lib.php
index 1dbd08f7cf6d22307612e924dc908ae683c0137c..2677859f1cda3ba2e95e3f000d09490cf297d3bf 100644 (file)
--- a/mod/assignment/lib.php
+++ b/mod/assignment/lib.php
@@ -586,6 +586,9 @@ class assignment_base {
 
                     if ($updatedb){
                         if ($newsubmission) {
+                            if (!isset($submission->submissioncomment)) {
+                                $submission->submissioncomment = '';
+                            }
                             if (!$sid = insert_record('assignment_submissions', $submission)) {
                                 return false;
                             }