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

xfa/src/fxbarcode/oned/BC_OnedCode39Reader.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 40 matching lines @@
     : m_usingCheckDigit(usingCheckDigit), m_extendedMode(extendedMode) {
 }
 CBC_OnedCode39Reader::~CBC_OnedCode39Reader() {}
 CFX_ByteString CBC_OnedCode39Reader::DecodeRow(int32_t rowNumber,
                                                CBC_CommonBitArray* row,
                                                int32_t hints,
                                                int32_t& e) {
   CFX_Int32Array* start = FindAsteriskPattern(row, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, "");
   int32_t nextStart = (*start)[1];
-  if (start != NULL) {
-    delete start;
-    start = NULL;
-  }
+  delete start;
   int32_t end = row->GetSize();
   while (nextStart < end && !row->Get(nextStart)) {
     nextStart++;
   }
   CFX_ByteString result;
   CFX_Int32Array counters;
   counters.SetSize(9);
   FX_CHAR decodedChar;
   int32_t lastStart;
   do {
@@ skipping 211 matching lines @@
           break;
       }
       decoded += decodedChar;
       i++;
     } else {
       decoded += c;
     }
   }
   return decoded;
 }