Get rid of NULLs in core/

core/fxge/win32/win32_int.h

 // 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
 
 #ifndef CORE_FXGE_WIN32_WIN32_INT_H_
 #define CORE_FXGE_WIN32_WIN32_INT_H_
 
 #include "core/fxge/include/fx_ge.h"
 #include "core/fxge/win32/dwrite_int.h"
 
 struct WINDIB_Open_Args_;
 class CGdiplusExt {
  public:
   CGdiplusExt();
   ~CGdiplusExt();
   void Load();
-  FX_BOOL IsAvailable() { return m_hModule != NULL; }
+  FX_BOOL IsAvailable() { return !!m_hModule; }
   FX_BOOL StretchBitMask(HDC hDC,
                          BOOL bMonoDevice,
                          const CFX_DIBitmap* pBitmap,
                          int dest_left,
                          int dest_top,
                          int dest_width,
                          int dest_height,
                          uint32_t argb,
                          const FX_RECT* pClipRect,
                          int flags);
@@ skipping 329 matching lines @@
 
   HDC m_hDC;
   FX_BOOL m_bCmykOutput;
   int m_Width, m_Height, m_nBitsPerPixel;
   int m_HorzSize, m_VertSize;
   CPSOutput* m_pPSOutput;
   CFX_PSRenderer m_PSRenderer;
 };
 
 #endif  // CORE_FXGE_WIN32_WIN32_INT_H_