MDL-12659 fixed warning; merged from MOODLE_19_STABLE

diff --git a/grade/report/lib.php b/grade/report/lib.php
index 1f652d427ab7b18d8d5bb429f133cd1ec5635462..672beec5e30ccddd194fd11cee6d65927ee712b5 100755 (executable)
--- a/grade/report/lib.php
+++ b/grade/report/lib.php
@@ -135,7 +135,7 @@ class grade_report {
     function grade_report($courseid, $gpr, $context, $page=null) {
         global $CFG, $COURSE;
 
-        if (!$CFG->gradebookroles) {
+        if (empty($CFG->gradebookroles)) {
             error ('no roles defined in admin->appearance->graderoles');
         }