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

xfa/src/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.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 42 matching lines @@
   for (int32_t i = 0; i < 255; i++) {
     m_logTable[m_expTable[i]] = i;
   }
   m_logTable[0] = 0;
 }
 void CBC_ReedSolomonGF256::Init() {
   m_zero = new CBC_ReedSolomonGF256Poly(this, 0);
   m_one = new CBC_ReedSolomonGF256Poly(this, 1);
 }
 CBC_ReedSolomonGF256::~CBC_ReedSolomonGF256() {
-  if (m_zero != NULL) {
-    delete m_zero;
-    m_zero = NULL;
-  }
-  if (m_one != NULL) {
-    delete m_one;
-    m_one = NULL;
-  }
+  delete m_zero;
+  delete m_one;
 }
 CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256::GetZero() {
   return m_zero;
 }
 CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256::GetOne() {
   return m_one;
 }
 CBC_ReedSolomonGF256Poly* CBC_ReedSolomonGF256::BuildMonomial(
     int32_t degree,
     int32_t coefficient,
@@ skipping 40 matching lines @@
     return 0;
   }
   if (a == 1) {
     return b;
   }
   if (b == 1) {
     return a;
   }
   return m_expTable[(m_logTable[a] + m_logTable[b]) % 255];
 }