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

core/include/fxcrt/fx_basic.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_INCLUDE_FXCRT_FX_BASIC_H_
 #define CORE_INCLUDE_FXCRT_FX_BASIC_H_
 
 #include "fx_memory.h"
@@ skipping 1053 matching lines @@
 };
 template <typename T1, typename T2>
 class CFX_ListArrayTemplate {
  public:
   void Clear() { m_Data.Clear(); }
 
   void Add(int32_t nStart, int32_t nCount) { m_Data.Append(nStart, nCount); }
 
   T2& operator[](int32_t nIndex) {
     uint8_t* data = m_Data.GetAt(nIndex);
-    FXSYS_assert(data != NULL);
+    FXSYS_assert(data);
     return (T2&)(*(volatile T2*)data);
   }
 
   T2* GetPtrAt(int32_t nIndex) { return (T2*)m_Data.GetAt(nIndex); }
 
  protected:
   T1 m_Data;
 };
 typedef CFX_ListArrayTemplate<CFX_SortListArray<sizeof(FX_FILESIZE)>,
                               FX_FILESIZE> CFX_FileSizeListArray;
@@ skipping 56 matching lines @@
   FX_FLOAT c;
   FX_FLOAT d;
   FX_FLOAT e;
   FX_FLOAT f;
   FX_FLOAT g;
   FX_FLOAT h;
   FX_FLOAT i;
 };
 
 #endif  // CORE_INCLUDE_FXCRT_FX_BASIC_H_