From de2248d1d432535f49fd728e45477879eb96c55a Mon Sep 17 00:00:00 2001
From: Mark Baker <mark@lange.demon.co.uk>
Date: Fri, 24 May 2013 09:19:13 +0100
Subject: [PATCH] Fix for SUMIF(), COUNTIF() and related functions if condition
 references a blank cell, courtesy of watermark86

---
 Classes/PHPExcel/Calculation/Functions.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Classes/PHPExcel/Calculation/Functions.php b/Classes/PHPExcel/Calculation/Functions.php
index 3e6a56db..5de66c41 100644
--- a/Classes/PHPExcel/Calculation/Functions.php
+++ b/Classes/PHPExcel/Calculation/Functions.php
@@ -308,6 +308,8 @@ class PHPExcel_Calculation_Functions {
 
 	public static function _ifCondition($condition) {
 		$condition	= PHPExcel_Calculation_Functions::flattenSingleValue($condition);
+		if (!isset($condition{0}))
+			$condition = '=""';
 		if (!in_array($condition{0},array('>', '<', '='))) {
 			if (!is_numeric($condition)) { $condition = PHPExcel_Calculation::_wrapResult(strtoupper($condition)); }
 			return '='.$condition;