Do not check pointers before deleting them.

xfa/fxbarcode/pdf417/BC_PDF417Detector.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 2009 ZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ skipping 96 matching lines @@
 CFX_PtrArray* CBC_Detector::detect(FX_BOOL multiple,
                                    CBC_CommonBitMatrix* bitMatrix) {
   CFX_PtrArray* barcodeCoordinates = new CFX_PtrArray;
   int32_t row = 0;
   int32_t column = 0;
   FX_BOOL foundBarcodeInRow = FALSE;
   while (row < bitMatrix->GetHeight()) {
     CFX_PtrArray* vertices = findVertices(bitMatrix, row, column);
     if (vertices->GetAt(0) == NULL && vertices->GetAt(3) == NULL) {
       if (!foundBarcodeInRow) {
-        if (vertices) {
-          delete (vertices);
-        }
+        delete vertices;
         break;
       }
       foundBarcodeInRow = FALSE;
       column = 0;
       for (int32_t i = 0; i < barcodeCoordinates->GetSize(); i++) {
         CFX_PtrArray* barcodeCoordinate =
             (CFX_PtrArray*)barcodeCoordinates->GetAt(i);
         if (barcodeCoordinate->GetAt(1)) {
           row = row > ((CBC_ResultPoint*)barcodeCoordinate->GetAt(1))->GetY();
         }
         if (barcodeCoordinate->GetAt(3)) {
           row = row > ((CBC_ResultPoint*)barcodeCoordinate->GetAt(3))->GetY();
         }
       }
       row += ROW_STEP;
-      if (vertices) {
-        delete (vertices);
-      }
+      delete vertices;
       continue;
     }
     foundBarcodeInRow = TRUE;
     barcodeCoordinates->Add(vertices);
     if (!multiple) {
       break;
     }
     if (vertices->GetAt(2)) {
       column = (int32_t)((CBC_ResultPoint*)vertices->GetAt(2))->GetX();
       row = (int32_t)((CBC_ResultPoint*)vertices->GetAt(2))->GetY();
@@ skipping 195 matching lines @@
     int32_t scaledPattern = pattern[x] * unitBarWidth;
     int32_t variance = counter > scaledPattern ? counter - scaledPattern
                                                : scaledPattern - counter;
     if (variance > maxIndividualVariance) {
       return INTEGER_MAX;
     }
     totalVariance += variance;
   }
   return totalVariance / total;
 }