Do not load main cross refs for first page in linearized pdf.

core/fpdfapi/parser/cpdf_parser.cpp

 // Copyright 2016 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/fpdfapi/parser/cpdf_parser.h"
 
 #include <vector>
 
@@ skipping 1541 matching lines @@
   uint32_t dwSaveMetadataObjnum = m_pSyntax->m_MetadataObjnum;
   m_pSyntax->m_MetadataObjnum = 0;
   m_pTrailer.reset();
   m_pSyntax->RestorePos(m_LastXRefOffset - m_pSyntax->m_HeaderOffset);
 
   uint8_t ch = 0;
   uint32_t dwCount = 0;
   m_pSyntax->GetNextChar(ch);
   while (PDFCharIsWhitespace(ch)) {
     ++dwCount;
-    if (m_pSyntax->m_FileLen >=
+    if (m_pSyntax->m_FileLen <=
         (FX_FILESIZE)(m_pSyntax->SavePos() + m_pSyntax->m_HeaderOffset)) {
       break;
     }
     m_pSyntax->GetNextChar(ch);
   }
   m_LastXRefOffset += dwCount;
   m_ObjectStreamMap.clear();
   m_ObjCache.clear();
 
   if (!LoadLinearizedAllCrossRefV4(m_LastXRefOffset, m_dwXrefStartObjNum) &&
       !LoadLinearizedAllCrossRefV5(m_LastXRefOffset)) {
     m_LastXRefOffset = 0;
     m_pSyntax->m_MetadataObjnum = dwSaveMetadataObjnum;
     return FORMAT_ERROR;
   }
 
   m_pSyntax->m_MetadataObjnum = dwSaveMetadataObjnum;
   return SUCCESS;
 }