Importing fix for bug 1921 from stable.

diff --git a/calendar/view.php b/calendar/view.php
index e57d524d204bf8fcc4a2bcb9d429d80c0ba764d9..8ade21a9fd79e691e319cdf3d8ee02cfd4903fb5 100644 (file)
--- a/calendar/view.php
+++ b/calendar/view.php
@@ -510,6 +510,7 @@ function calendar_show_month_detailed($m, $y, $courses, $groups, $users) {
 }
 
 function calendar_show_upcoming_events($courses, $groups, $users, $futuredays, $maxevents) {
+    global $USER;
 
     $events = calendar_get_upcoming($courses, $groups, $users, $futuredays, $maxevents);