MDL-70750 mod_survey: Fix warning for undefined offset.

2021-06-21 08:41:48 +02:00
parent 338b60f43b
commit 6ecfb59077
1 changed files with 1 additions and 1 deletions
@@ -307,7 +307,7 @@ class graph {
        //print "$thisX, $thisY <br />";

        if (($bar!='none') && (string)$thisY != 'none') {
-            if ($relatedset = $this->offset_relation[$set]) {                               // Moodle
+            if (isset($this->offset_relation[$set]) && $relatedset = $this->offset_relation[$set]) {
                $yoffset = $this->calculated['y_plot'][$relatedset][$index];                // Moodle
            } else {                                                                        // Moodle
                $yoffset = 0;                                                               // Moodle