Do not check pointers before deleting them.

xfa/fxbarcode/qrcode/BC_QRCodeReader.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 75 matching lines @@
   CFX_ByteString bs = Decode(&bitmap, hints, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, "");
   return bs;
 }
 CFX_ByteString CBC_QRCodeReader::Decode(CBC_BinaryBitmap* image, int32_t& e) {
   CFX_ByteString bs = Decode(image, 0, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, "");
   return bs;
 }
 void CBC_QRCodeReader::ReleaseAll() {
-  if (CBC_ReedSolomonGF256::QRCodeFild) {
-    delete CBC_ReedSolomonGF256::QRCodeFild;
-    CBC_ReedSolomonGF256::QRCodeFild = NULL;
-  }
-  if (CBC_ReedSolomonGF256::DataMatrixField) {
-    delete CBC_ReedSolomonGF256::DataMatrixField;
-    CBC_ReedSolomonGF256::DataMatrixField = NULL;
-  }
+  delete CBC_ReedSolomonGF256::QRCodeFild;
+  CBC_ReedSolomonGF256::QRCodeFild = nullptr;
+  delete CBC_ReedSolomonGF256::DataMatrixField;
+  CBC_ReedSolomonGF256::DataMatrixField = nullptr;
   CBC_QRCoderMode::Destroy();
   CBC_QRCoderErrorCorrectionLevel::Destroy();
   CBC_QRDataMask::Destroy();
   CBC_QRCoderVersion::Destroy();
 }