From bdd60af2824e024ea7ec89c2016252575e967fb3 Mon Sep 17 00:00:00 2001
From: William Desportes <williamdes@wdes.fr>
Date: Wed, 4 Jul 2018 22:23:17 +0200
Subject: [PATCH] Fix #14457 - mb_stubstr null

Closes: #14457
Signed-off-by: William Desportes <williamdes@wdes.fr>
---
 libraries/classes/Display/Results.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/classes/Display/Results.php b/libraries/classes/Display/Results.php
index dba6267613..1105148ee0 100644
--- a/libraries/classes/Display/Results.php
+++ b/libraries/classes/Display/Results.php
@@ -4701,7 +4701,7 @@ class Results
 
         $column_for_last_row = mb_strtoupper(
             mb_substr(
-                $column_for_last_row,
+                (string) $column_for_last_row,
                 0,
                 $GLOBALS['cfg']['LimitChars']
             ) . '...'