From 1d0900445bd40f81be36090960451fb86481aa14 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20FRANCE?=
 <frederic34@users.noreply.github.com>
Date: Sun, 1 Dec 2019 18:52:50 +0100
Subject: [PATCH] The variable $letter does not seem...

The variable $letter does not seem to be defined for all execution paths
---
 htdocs/core/modules/export/export_excel.modules.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/htdocs/core/modules/export/export_excel.modules.php b/htdocs/core/modules/export/export_excel.modules.php
index 9d89d53de2a..43cb4d6e9cd 100644
--- a/htdocs/core/modules/export/export_excel.modules.php
+++ b/htdocs/core/modules/export/export_excel.modules.php
@@ -510,6 +510,7 @@ class ExportExcel extends ModeleExports
     {
 
         $c = intval($c);
+        $letter = '';
         if ($c <= 0) {
             return '';
         }