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

xfa/src/fxbarcode/oned/BC_OnedCode128Reader.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 171 matching lines @@
     case 103:
       codeSet = CODE_CODE_A;
       break;
     case 104:
       codeSet = CODE_CODE_B;
       break;
     case 105:
       codeSet = CODE_CODE_C;
       break;
     default:
-      if (startPatternInfo != NULL) {
+      if (startPatternInfo) {
         startPatternInfo->RemoveAll();
         delete startPatternInfo;
         startPatternInfo = NULL;
       }
       e = BCExceptionFormatException;
       return "";
   }
   FX_BOOL done = FALSE;
   FX_BOOL isNextShifted = FALSE;
   CFX_ByteString result;
   int32_t lastStart = (*startPatternInfo)[0];
   int32_t nextStart = (*startPatternInfo)[1];
-  if (startPatternInfo != NULL) {
+  if (startPatternInfo) {
     startPatternInfo->RemoveAll();
     delete startPatternInfo;
     startPatternInfo = NULL;
   }
   CFX_Int32Array counters;
   counters.SetSize(6);
   int32_t lastCode = 0;
   int32_t code = 0;
   int32_t checksumTotal = startCode;
   int32_t multiplier = 0;
@@ skipping 143 matching lines @@
     } else {
       result = result.Mid(0, result.GetLength() - 1);
     }
   }
   if (result.GetLength() == 0) {
     e = BCExceptionFormatException;
     return "";
   }
   return result;
 }