Fix loading page using hint tables.

core/fpdfapi/parser/cpdf_document.cpp

 // Copyright 2014 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_document.h"
 
 #include <memory>
 #include <set>
@@ skipping 407 matching lines @@
       m_dwFirstPageObjNum(0),
       m_pDocPage(new CPDF_DocPageData(this)),
       m_pDocRender(new CPDF_DocRenderData(this)),
       m_pByteStringPool(pdfium::MakeUnique<CFX_ByteStringPool>()) {
   if (pParser)
     SetLastObjNum(m_pParser->GetLastObjNum());
 }
 
 CPDF_Document::~CPDF_Document() {
   delete m_pDocPage;
-  CPDF_ModuleMgr::Get()->GetPageModule()->ClearStockFont(this);
+  if (CPDF_ModuleMgr::Get()->GetPageModule()) {
+    CPDF_ModuleMgr::Get()->GetPageModule()->ClearStockFont(this);
+  }
   m_pByteStringPool.DeleteObject();  // Make weak.
 }
 
 CPDF_Object* CPDF_Document::ParseIndirectObject(uint32_t objnum) {
   return m_pParser ? m_pParser->ParseIndirectObject(this, objnum) : nullptr;
 }
 
 void CPDF_Document::LoadDocInternal() {
   SetLastObjNum(m_pParser->GetLastObjNum());
 
@@ skipping 574 matching lines @@
                         pBBox, pLogFont->lfWeight / 5);
   pFontDesc->SetIntegerFor("CapHeight", capheight);
   pFontDict->SetReferenceFor("FontDescriptor", this,
                              AddIndirectObject(pFontDesc));
   hFont = SelectObject(hDC, hFont);
   DeleteObject(hFont);
   DeleteDC(hDC);
   return LoadFont(pBaseDict);
 }
 #endif  //  _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_