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

xfa/src/fxbarcode/oned/BC_OnedUPCAReader.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 2008 ZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ skipping 15 matching lines @@
 #include "xfa/src/fxbarcode/oned/BC_OneDimReader.h"
 #include "xfa/src/fxbarcode/oned/BC_OnedEAN13Reader.h"
 #include "xfa/src/fxbarcode/oned/BC_OnedUPCAReader.h"
 CBC_OnedUPCAReader::CBC_OnedUPCAReader() {
   m_ean13Reader = NULL;
 }
 void CBC_OnedUPCAReader::Init() {
   m_ean13Reader = new CBC_OnedEAN13Reader;
 }
 CBC_OnedUPCAReader::~CBC_OnedUPCAReader() {
-  if (m_ean13Reader != NULL) {
-    delete m_ean13Reader;
-  }
-  m_ean13Reader = NULL;
+  delete m_ean13Reader;
 }
 CFX_ByteString CBC_OnedUPCAReader::DecodeRow(int32_t rowNumber,
                                              CBC_CommonBitArray* row,
                                              int32_t hints,
                                              int32_t& e) {
   CFX_ByteString bytestring =
       m_ean13Reader->DecodeRow(rowNumber, row, hints, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, "");
   CFX_ByteString temp = MaybeReturnResult(bytestring, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, "");
@@ skipping 39 matching lines @@
                                                      int32_t& e) {
   if (result[0] == '0') {
     result.Delete(0);
     return result;
   } else {
     e = BCExceptionFormatException;
     return "";
   }
   return "";
 }