Get rid of most instance of 'foo != NULL'

core/src/fpdfapi/fpdf_edit/fpdf_edit_image.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
 
 #include "core/include/fpdfapi/fpdf_module.h"
 #include "core/include/fpdfapi/fpdf_page.h"
 #include "core/include/fpdfapi/fpdf_render.h"
 #include "core/include/fxcodec/fx_codec.h"
@@ skipping 241 matching lines @@
       pMatte->AddInteger(b);
       pMaskDict->SetAt("Matte", pMatte);
     }
     CPDF_Stream* pMaskStream = new CPDF_Stream(mask_buf, mask_size, pMaskDict);
     m_pDocument->AddIndirectObject(pMaskStream);
     pDict->SetAtReference("SMask", m_pDocument, pMaskStream);
     if (bDeleteMask) {
       delete pMaskBitmap;
     }
   }
-  FX_BOOL bStream = pFileWrite != NULL && pFileRead != NULL;
+  FX_BOOL bStream = pFileWrite && pFileRead;
   if (opType == 0) {
     if (iCompress & PDF_IMAGE_LOSSLESS_COMPRESS) {
       if (pBitmap->GetBPP() == 1) {
         _JBIG2EncodeBitmap(pDict, pBitmap, m_pDocument, dest_buf, dest_size,
                            TRUE);
       }
     } else {
       if (pBitmap->GetBPP() == 1) {
         _JBIG2EncodeBitmap(pDict, pBitmap, m_pDocument, dest_buf, dest_size,
                            FALSE);
-      } else if (pBitmap->GetBPP() >= 8 && pBitmap->GetPalette() != NULL) {
+      } else if (pBitmap->GetBPP() >= 8 && pBitmap->GetPalette()) {
         CFX_DIBitmap* pNewBitmap = new CFX_DIBitmap();
         pNewBitmap->Copy(pBitmap);
         pNewBitmap->ConvertFormat(FXDIB_Rgb);
         SetImage(pNewBitmap, iCompress, pFileWrite, pFileRead);
         if (pDict) {
           pDict->Release();
           pDict = NULL;
         }
         FX_Free(dest_buf);
         dest_buf = NULL;
@@ skipping 93 matching lines @@
     m_pStream->InitStreamFromFile(pFileRead, pDict);
   }
   m_bIsMask = pBitmap->IsAlphaMask();
   m_Width = BitmapWidth;
   m_Height = BitmapHeight;
   FX_Free(dest_buf);
 }
 void CPDF_Image::ResetCache(CPDF_Page* pPage, const CFX_DIBitmap* pBitmap) {
   pPage->GetRenderCache()->ResetBitmap(m_pStream, pBitmap);
 }