Get rid of NULLs in xfa/fxbarcode/

xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonDecoder.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 163 matching lines @@
     temp->Add(errorLocator->GetCoefficients(1));
     return temp.release();
   }
   CFX_Int32Array* tempT = new CFX_Int32Array;
   tempT->SetSize(numErrors);
   std::unique_ptr<CFX_Int32Array> result(tempT);
   int32_t ie = 0;
   for (int32_t i = 1; i < 256 && ie < numErrors; i++) {
     if (errorLocator->EvaluateAt(i) == 0) {
       (*result)[ie] = m_field->Inverse(i, ie);
-      BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+      BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
       ie++;
     }
   }
   if (ie != numErrors) {
     e = BCExceptionDegreeNotMatchRoots;
-    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   }
   return result.release();
 }
 CFX_Int32Array* CBC_ReedSolomonDecoder::FindErrorMagnitudes(
     CBC_ReedSolomonGF256Poly* errorEvaluator,
     CFX_Int32Array* errorLocations,
     FX_BOOL dataMatrix,
     int32_t& e) {
   int32_t s = errorLocations->GetSize();
   CFX_Int32Array* tempArray = new CFX_Int32Array;
   tempArray->SetSize(s);
   std::unique_ptr<CFX_Int32Array> result(tempArray);
   for (int32_t i = 0; i < s; i++) {
     int32_t xiInverse = m_field->Inverse(errorLocations->operator[](i), e);
-    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
     int32_t denominator = 1;
     for (int32_t j = 0; j < s; j++) {
       if (i != j) {
         denominator = m_field->Multiply(
             denominator, CBC_ReedSolomonGF256::AddOrSubtract(
                              1, m_field->Multiply(errorLocations->operator[](j),
                                                   xiInverse)));
       }
     }
     int32_t temp = m_field->Inverse(denominator, e);
-    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
     (*result)[i] =
         m_field->Multiply(errorEvaluator->EvaluateAt(xiInverse), temp);
   }
   return result.release();
 }