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

core/src/fpdfapi/fpdf_edit/fpdf_edit_create.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 "editint.h"
 
 #include "core/include/fxcrt/fx_ext.h"
 #include "core/include/fpdfapi/fpdf_serial.h"
@@ skipping 1415 matching lines @@
     i++;
   }
   if (i >= iCount) {
     return;
   }
   FX_DWORD dwLastObjNum = dwStartObjNum;
   i++;
   FX_BOOL bNewStart = FALSE;
   for (; i < iCount; i++) {
     FX_DWORD dwCurObjNum = m_NewObjNumArray.ElementAt(i);
-    FX_BOOL bExist = (dwCurObjNum < nOldSize &&
-                      m_ObjectOffset.GetPtrAt(dwCurObjNum) != NULL);
+    FX_BOOL bExist =
+        (dwCurObjNum < nOldSize && m_ObjectOffset.GetPtrAt(dwCurObjNum));
     if (bExist || dwCurObjNum - dwLastObjNum > 1) {
       if (!bNewStart) {
         m_ObjectOffset.Add(dwStartObjNum, dwLastObjNum - dwStartObjNum + 1);
         m_ObjectSize.Add(dwStartObjNum, dwLastObjNum - dwStartObjNum + 1);
       }
       dwStartObjNum = dwCurObjNum;
     }
     if (bNewStart) {
       dwStartObjNum = dwCurObjNum;
     }
@@ skipping 655 matching lines @@
   m_bNewCrypto = FALSE;
   if (!m_bStandardSecurity) {
     return;
   }
   if (m_pEncryptDict) {
     m_pEncryptDict->Release();
     m_pEncryptDict = NULL;
   }
   m_bStandardSecurity = FALSE;
 }