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

core/src/fxge/dib/fx_dib_transform.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 "dib_int.h"
 
 #include "core/include/fxge/fx_dib.h"
 
@@ skipping 405 matching lines @@
     return m_Stretcher.Continue(pPause);
   }
   if (m_Status != 3) {
     return FALSE;
   }
   if (m_Stretcher.Continue(pPause)) {
     return TRUE;
   }
   int stretch_width = m_StretchClip.Width();
   int stretch_height = m_StretchClip.Height();
-  if (m_Storer.GetBitmap() == NULL) {
+  if (!m_Storer.GetBitmap()) {
     return FALSE;
   }
   const uint8_t* stretch_buf = m_Storer.GetBitmap()->GetBuffer();
   const uint8_t* stretch_buf_mask = NULL;
   if (m_Storer.GetBitmap()->m_pAlphaMask) {
     stretch_buf_mask = m_Storer.GetBitmap()->m_pAlphaMask->GetBuffer();
   }
   int stretch_pitch = m_Storer.GetBitmap()->GetPitch();
   CFX_DIBitmap* pTransformed = new CFX_DIBitmap;
   FXDIB_Format transformF = GetTransformedFormat(m_Stretcher.m_pSource);
   if (!pTransformed->Create(m_ResultWidth, m_ResultHeight, transformF)) {
     delete pTransformed;
     return FALSE;
   }
   pTransformed->Clear(0);
   if (pTransformed->m_pAlphaMask) {
     pTransformed->m_pAlphaMask->Clear(0);
   }
   CFX_Matrix result2stretch(1.0f, 0.0f, 0.0f, 1.0f, (FX_FLOAT)(m_ResultLeft),
                             (FX_FLOAT)(m_ResultTop));
   result2stretch.Concat(m_dest2stretch);
   result2stretch.TranslateI(-m_StretchClip.left, -m_StretchClip.top);
-  if (stretch_buf_mask == NULL && pTransformed->m_pAlphaMask) {
+  if (!stretch_buf_mask && pTransformed->m_pAlphaMask) {
     pTransformed->m_pAlphaMask->Clear(0xff000000);
   } else if (pTransformed->m_pAlphaMask) {
     int stretch_pitch_mask = m_Storer.GetBitmap()->m_pAlphaMask->GetPitch();
     if (!(m_Flags & FXDIB_DOWNSAMPLE) && !(m_Flags & FXDIB_BICUBIC_INTERPOL)) {
       CFX_BilinearMatrix result2stretch_fix(result2stretch, 8);
       for (int row = 0; row < m_ResultHeight; row++) {
         uint8_t* dest_pos_mask =
             (uint8_t*)pTransformed->m_pAlphaMask->GetScanline(row);
         for (int col = 0; col < m_ResultWidth; col++) {
           int src_col_l, src_row_l, res_x, res_y;
@@ skipping 479 matching lines @@
             }
             dest_pos += destBpp;
           }
         }
       }
     }
   }
   m_Storer.Replace(pTransformed);
   return FALSE;
 }