Get rid of NULLs in xfa/fxbarcode/

xfa/fxbarcode/common/BC_CommonBitMatrix.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
 // Original code is licensed as follows:
 /*
  * Copyright 2007 ZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ skipping 10 matching lines @@
  */
 
 #include "xfa/fxbarcode/common/BC_CommonBitArray.h"
 #include "xfa/fxbarcode/common/BC_CommonBitMatrix.h"
 #include "xfa/fxbarcode/utils.h"
 
 CBC_CommonBitMatrix::CBC_CommonBitMatrix() {
   m_width = 0;
   m_height = 0;
   m_rowSize = 0;
-  m_bits = NULL;
+  m_bits = nullptr;
 }
 void CBC_CommonBitMatrix::Init(int32_t dimension) {
   m_width = dimension;
   m_height = dimension;
   int32_t rowSize = (m_height + 31) >> 5;
   m_rowSize = rowSize;
   m_bits = FX_Alloc2D(int32_t, m_rowSize, m_height);
   FXSYS_memset(m_bits, 0, m_rowSize * m_height * sizeof(int32_t));
 }
 void CBC_CommonBitMatrix::Init(int32_t width, int32_t height) {
@@ skipping 54 matching lines @@
   for (y = top; y < bottom; y++) {
     int32_t offset = y * m_rowSize;
     int32_t x;
     for (x = left; x < right; x++) {
       m_bits[offset + (x >> 5)] |= 1 << (x & 0x1f);
     }
   }
 }
 CBC_CommonBitArray* CBC_CommonBitMatrix::GetRow(int32_t y,
                                                 CBC_CommonBitArray* row) {
-  CBC_CommonBitArray* rowArray = NULL;
-  if (row == NULL || row->GetSize() < m_width) {
+  CBC_CommonBitArray* rowArray = nullptr;
+  if (!row || row->GetSize() < m_width) {
     rowArray = new CBC_CommonBitArray(m_width);
   } else {
     rowArray = new CBC_CommonBitArray(row);
   }
   int32_t offset = y * m_rowSize;
   int32_t x;
   for (x = 0; x < m_rowSize; x++) {
     rowArray->SetBulk(x << 5, m_bits[offset + x]);
   }
   return rowArray;
@@ skipping 19 matching lines @@
 int32_t CBC_CommonBitMatrix::GetRowSize() {
   return m_rowSize;
 }
 int32_t CBC_CommonBitMatrix::GetDimension(int32_t& e) {
   if (m_width != m_height) {
     e = BCExceptionCanNotCallGetDimensionOnNonSquareMatrix;
     return 0;
   }
   return m_width;
 }