Get rid of NULLs in core/

core/fxge/dib/dib_int.h

 // 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
 
 #ifndef CORE_FXGE_DIB_DIB_INT_H_
 #define CORE_FXGE_DIB_DIB_INT_H_
 
 #include <stdint.h>
@@ skipping 24 matching lines @@
   int base;
 };
 #define FPDF_HUGE_IMAGE_SIZE 60000000
 struct PixelWeight {
   int m_SrcStart;
   int m_SrcEnd;
   int m_Weights[1];
 };
 class CWeightTable {
  public:
-  CWeightTable() { m_pWeightTables = NULL; }
+  CWeightTable() { m_pWeightTables = nullptr; }
   ~CWeightTable() {
     FX_Free(m_pWeightTables);
-    m_pWeightTables = NULL;
+    m_pWeightTables = nullptr;
   }
   void Calc(int dest_len,
             int dest_min,
             int dest_max,
             int src_len,
             int src_min,
             int src_max,
             int flags);
   PixelWeight* GetPixelWeight(int pixel) {
     return (PixelWeight*)(m_pWeightTables + (pixel - m_DestMin) * m_ItemSize);
@@ skipping 39 matching lines @@
   int m_State;
 };
 
 FX_RECT FXDIB_SwapClipBox(FX_RECT& clip,
                           int width,
                           int height,
                           FX_BOOL bFlipX,
                           FX_BOOL bFlipY);
 
 #endif  // CORE_FXGE_DIB_DIB_INT_H_