From acb9c9c260a9ee29f4d46f8248eefcac11533dd6 Mon Sep 17 00:00:00 2001
From: Dmitry-Me <wipedout@yandex.ru>
Date: Mon, 4 Aug 2014 09:49:25 +0400
Subject: [PATCH] Check ftell() result for error code before using it.

---
 tinyxml2.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tinyxml2.cpp b/tinyxml2.cpp
index 25691b9..a6ad63a 100755
--- a/tinyxml2.cpp
+++ b/tinyxml2.cpp
@@ -1695,9 +1695,14 @@ XMLError XMLDocument::LoadFile( FILE* fp )
     }
 
     fseek( fp, 0, SEEK_END );
-    size_t size = ftell( fp );
+    const long filelength = ftell( fp );
     fseek( fp, 0, SEEK_SET );
+    if ( filelength == -1L ) {
+        SetError( XML_ERROR_FILE_READ_ERROR, 0, 0 );
+        return _errorID;
+    }
 
+    const size_t size = filelength;
     if ( size == 0 ) {
         SetError( XML_ERROR_EMPTY_DOCUMENT, 0, 0 );
         return _errorID;