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

core/src/fxge/win32/fx_win32_device.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/fxge/fx_ge.h"
 
 #if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_DESKTOP_
 #include <crtdbg.h>
@@ skipping 1168 matching lines @@
                                          FX_DWORD color,
                                          int dest_left,
                                          int dest_top,
                                          int dest_width,
                                          int dest_height,
                                          const FX_RECT* pClipRect,
                                          FX_DWORD flags,
                                          int alpha_flag,
                                          void* pIccTransform,
                                          int blend_type) {
-  ASSERT(pSource != NULL && pClipRect != NULL);
+  ASSERT(pSource && pClipRect);
   if (flags || dest_width > 10000 || dest_width < -10000 ||
       dest_height > 10000 || dest_height < -10000) {
     return UseFoxitStretchEngine(pSource, color, dest_left, dest_top,
                                  dest_width, dest_height, pClipRect, flags,
                                  alpha_flag, pIccTransform, blend_type);
   }
   if (pSource->IsAlphaMask()) {
     FX_RECT image_rect;
     image_rect.left = dest_width > 0 ? dest_left : dest_left + dest_width;
     image_rect.right = dest_width > 0 ? dest_left + dest_width : dest_left;
@@ skipping 156 matching lines @@
     SelectObject(m_hDC, m_hOldBitmap);
     DeleteDC(m_hDC);
   }
   if (m_hBitmap) {
     DeleteObject(m_hBitmap);
   }
   delete GetBitmap();
 }
 
 #endif  // _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_