From e487f5c11a4b62376015d1e7da27420be0932275 Mon Sep 17 00:00:00 2001
From: MarkBaker <mark@lange.demon.co.uk>
Date: Thu, 14 Jul 2016 23:05:28 +0100
Subject: [PATCH] Fix for multiple worksheets, all with merge cells, in HTML
 Writer

---
 Classes/PHPExcel/Writer/HTML.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Classes/PHPExcel/Writer/HTML.php b/Classes/PHPExcel/Writer/HTML.php
index 5dcb998..8fd6255 100644
--- a/Classes/PHPExcel/Writer/HTML.php
+++ b/Classes/PHPExcel/Writer/HTML.php
@@ -398,7 +398,7 @@ class PHPExcel_Writer_HTML extends PHPExcel_Writer_Abstract implements PHPExcel_
         }
 
         // Ensure that Spans have been calculated?
-        if (!$this->spansAreCalculated) {
+        if ($this->_sheetIndex !== null || !$this->spansAreCalculated) {
             $this->calculateSpans();
         }