Get rid of NULLs in core/

core/fpdfdoc/doc_viewerPreferences.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/fpdf_parser/include/cpdf_document.h"
 #include "core/fpdfdoc/include/fpdf_doc.h"
 
 CPDF_ViewerPreferences::CPDF_ViewerPreferences(CPDF_Document* pDoc)
@@ skipping 18 matching lines @@
 int32_t CPDF_ViewerPreferences::NumCopies() const {
   CPDF_Dictionary* pDict = m_pDoc->GetRoot();
   pDict = pDict->GetDictBy("ViewerPreferences");
   if (!pDict) {
     return 1;
   }
   return pDict->GetIntegerBy("NumCopies");
 }
 CPDF_Array* CPDF_ViewerPreferences::PrintPageRange() const {
   CPDF_Dictionary* pDict = m_pDoc->GetRoot();
-  CPDF_Array* pRange = NULL;
+  CPDF_Array* pRange = nullptr;

[Tom Sepez, 2016/06/02 20:09:48]

nit: local not needed.  

[Lei Zhang, 2016/06/07 07:33:23]

Done.

   pDict = pDict->GetDictBy("ViewerPreferences");
   if (!pDict) {
     return pRange;
   }
   pRange = pDict->GetArrayBy("PrintPageRange");
   return pRange;
 }
 CFX_ByteString CPDF_ViewerPreferences::Duplex() const {
   CPDF_Dictionary* pDict = m_pDoc->GetRoot();
   pDict = pDict->GetDictBy("ViewerPreferences");
   if (!pDict) {
     return "None";
   }
   return pDict->GetStringBy("Duplex");
 }