From 96b110d25e3bc4982b8c5becedabd5cde46ed8d8 Mon Sep 17 00:00:00 2001
From: Dmitry-Me <wipedout@yandex.ru>
Date: Tue, 9 Feb 2016 15:12:40 +0300
Subject: [PATCH] Assert to ensure ftell() behaves as expected by later code

---
 tinyxml2.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tinyxml2.cpp b/tinyxml2.cpp
index c4ea7cd..df49d0d 100755
--- a/tinyxml2.cpp
+++ b/tinyxml2.cpp
@@ -1954,6 +1954,7 @@ XMLError XMLDocument::LoadFile( FILE* fp )
         SetError( XML_ERROR_FILE_READ_ERROR, 0, 0 );
         return _errorID;
     }
+    TIXMLASSERT( filelength >= 0 );
 
     if ( !LongFitsIntoSizeTMinusOne<>::Fits( filelength ) ) {
         // Cannot handle files which won't fit in buffer together with null terminator