From 1efa93020249e0453783c862ae5e9fdecdbdeeaf Mon Sep 17 00:00:00 2001
From: Ankit Agarwal <ankit@moodle.com>
Date: Wed, 30 Oct 2013 10:47:53 +0800
Subject: [PATCH] MDL-42604 scorm: Fix division by zero warnings in error logs

---
 mod/scorm/report/graphs/graph.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mod/scorm/report/graphs/graph.php b/mod/scorm/report/graphs/graph.php
index 3d9b7f44032..474db2a9747 100644
--- a/mod/scorm/report/graphs/graph.php
+++ b/mod/scorm/report/graphs/graph.php
@@ -168,7 +168,7 @@ while ($gridlines >= 10) {
         $gridlines /= 2;
     }
 }
-
-$line->parameter['y_axis_gridlines'] = $gridlines + 1;
+$gridlines = max(2, ($gridlines + 1)); // We need a minimum of two lines.
+$line->parameter['y_axis_gridlines'] = $gridlines;
 
 $line->draw();