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

xfa/src/fxbarcode/pdf417/BC_PDF417DetectionResultColumn.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 2013 ZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ skipping 23 matching lines @@
 }
 CBC_DetectionResultColumn::~CBC_DetectionResultColumn() {
   for (int32_t i = 0; i < m_codewords->GetSize(); i++) {
     delete (CBC_Codeword*)m_codewords->GetAt(i);
   }
   m_codewords->RemoveAll();
   delete m_codewords;
 }
 CBC_Codeword* CBC_DetectionResultColumn::getCodewordNearby(int32_t imageRow) {
   CBC_Codeword* codeword = getCodeword(imageRow);
-  if (codeword != NULL) {
+  if (codeword) {
     return codeword;
   }
   for (int32_t i = 1; i < MAX_NEARBY_DISTANCE; i++) {
     int32_t nearImageRow = imageRowToCodewordIndex(imageRow) - i;
     if (nearImageRow >= 0) {
       codeword = (CBC_Codeword*)m_codewords->GetAt(nearImageRow);
-      if (codeword != NULL) {
+      if (codeword) {
         return codeword;
       }
     }
     nearImageRow = imageRowToCodewordIndex(imageRow) + i;
     if (nearImageRow < m_codewords->GetSize()) {
       codeword = (CBC_Codeword*)m_codewords->GetAt(nearImageRow);
-      if (codeword != NULL) {
+      if (codeword) {
         return codeword;
       }
     }
   }
   return NULL;
 }
 int32_t CBC_DetectionResultColumn::imageRowToCodewordIndex(int32_t imageRow) {
   return imageRow - m_boundingBox->getMinY();
 }
 int32_t CBC_DetectionResultColumn::codewordIndexToImageRow(
@@ skipping 23 matching lines @@
       row++;
       continue;
     }
     result += (FX_CHAR)row;
     result += codeword->getRowNumber();
     result += codeword->getValue();
     row++;
   }
   return result;
 }