Do not check pointers before deleting them.

xfa/fxbarcode/pdf417/BC_PDF417BoundingBox.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 24 matching lines @@
       (bottomLeft == NULL && bottomRight == NULL) ||
       (topLeft && bottomLeft == NULL) || (topRight && bottomRight == NULL)) {
     e = BCExceptionNotFoundInstance;
   }
   init(image, topLeft, bottomLeft, topRight, bottomRight);
 }
 CBC_BoundingBox::CBC_BoundingBox(CBC_BoundingBox* boundingBox) {
   init(boundingBox->m_image, boundingBox->m_topLeft, boundingBox->m_bottomLeft,
        boundingBox->m_topRight, boundingBox->m_bottomRight);
 }
+
 CBC_BoundingBox::~CBC_BoundingBox() {
-  if (m_topLeft) {
-    delete m_topLeft;
-  }
-  if (m_bottomLeft) {
-    delete m_bottomLeft;
-  }
-  if (m_topRight) {
-    delete m_topRight;
-  }
-  if (m_bottomRight) {
-    delete m_bottomRight;
-  }
+  delete m_topLeft;
+  delete m_bottomLeft;
+  delete m_topRight;
+  delete m_bottomRight;
 }
+
 CBC_BoundingBox* CBC_BoundingBox::merge(CBC_BoundingBox* leftBox,
                                         CBC_BoundingBox* rightBox,
                                         int32_t& e) {
   CBC_BoundingBox* boundingBox = NULL;
   if (leftBox == NULL) {
     boundingBox = new CBC_BoundingBox(rightBox);
     return boundingBox;
   }
   if (rightBox == NULL) {
     boundingBox = new CBC_BoundingBox(leftBox);
@@ skipping 129 matching lines @@
   m_maxX = (int32_t)(m_topRight->GetX() > m_bottomRight->GetX()
                          ? m_topRight->GetX()
                          : m_bottomRight->GetX());
   m_minY =
       (int32_t)(m_topLeft->GetY() < m_topRight->GetY() ? m_topLeft->GetY()
                                                        : m_topRight->GetY());
   m_maxY = (int32_t)(m_bottomLeft->GetY() > m_bottomRight->GetY()
                          ? m_bottomLeft->GetY()
                          : m_bottomRight->GetY());
 }