From 75c65210c59de575f5a536f53bab9018b6edbed9 Mon Sep 17 00:00:00 2001
From: Ryan Harrison <rharrison@chromium.org>
Date: Wed, 16 Aug 2017 13:52:15 -0400
Subject: Add in missting string length check

BUG=chromium:754984

Change-Id: I106d460c80804797cee537d1990f901b5bf5a519
Reviewed-on: https://pdfium-review.googlesource.com/11171
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
---
 fpdfsdk/javascript/PublicMethods.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fpdfsdk/javascript/PublicMethods.cpp b/fpdfsdk/javascript/PublicMethods.cpp
index 2996316d79..09815413ad 100644
--- a/fpdfsdk/javascript/PublicMethods.cpp
+++ b/fpdfsdk/javascript/PublicMethods.cpp
@@ -1762,7 +1762,7 @@ bool CJS_PublicMethods::AFExtractNums(CJS_Runtime* pRuntime,
   }
 
   CFX_WideString str = params[0].ToCFXWideString(pRuntime);
-  if (str[0] == L'.' || str[0] == L',')
+  if (str.GetLength() > 0 && (str[0] == L'.' || str[0] == L','))
     str = L"0" + str;
 
   CFX_WideString sPart;
-- 
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