Remove foo != NULL checks in xfa/src/fxbarcode.

xfa/src/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 29 matching lines @@
 }
 void CBC_CommonBitMatrix::Init(int32_t width, int32_t height) {
   m_width = width;
   m_height = height;
   int32_t rowSize = (width + 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));
 }
 CBC_CommonBitMatrix::~CBC_CommonBitMatrix() {
-  if (m_bits != NULL) {
-    FX_Free(m_bits);
-  }
-  m_bits = NULL;
-  m_height = m_width = m_rowSize = 0;
+  FX_Free(m_bits);
 }
 FX_BOOL CBC_CommonBitMatrix::Get(int32_t x, int32_t y) {
   int32_t offset = y * m_rowSize + (x >> 5);
   if (offset >= m_rowSize * m_height || offset < 0) {
     return false;
   }
   return ((((FX_DWORD)m_bits[offset]) >> (x & 0x1f)) & 1) != 0;
 }
 int32_t* CBC_CommonBitMatrix::GetBits() {
   return m_bits;
@@ skipping 76 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;
 }