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

fpdfsdk/src/fpdfformfill.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 "public/fpdf_formfill.h"
 
 #include "fpdfsdk/include/fsdk_define.h"
 #include "fpdfsdk/include/fsdk_mgr.h"
@@ skipping 298 matching lines @@
   CPDF_Document* pDoc = pSDKDoc->GetPDFDocument();
   CPDF_Dictionary* pDic = pDoc->GetRoot();
   if (!pDic)
     return;
 
   CPDF_AAction aa = pDic->GetDict("AA");
   if (aa.ActionExist((CPDF_AAction::AActionType)aaType)) {
     CPDF_Action action = aa.GetAction((CPDF_AAction::AActionType)aaType);
     CPDFSDK_ActionHandler* pActionHandler =
         ((CPDFDoc_Environment*)hHandle)->GetActionHander();
-    ASSERT(pActionHandler != NULL);
     pActionHandler->DoAction_Document(action, (CPDF_AAction::AActionType)aaType,
                                       pSDKDoc);
   }
 }
 
 DLLEXPORT void STDCALL FORM_DoPageAAction(FPDF_PAGE page,
                                           FPDF_FORMHANDLE hHandle,
                                           int aaType) {
   if (!hHandle)
     return;
@@ skipping 13 matching lines @@
         pActionHandler->DoAction_Page(action, CPDF_AAction::OpenPage, pSDKDoc);
       }
     } else {
       if (aa.ActionExist(CPDF_AAction::ClosePage)) {
         CPDF_Action action = aa.GetAction(CPDF_AAction::ClosePage);
         pActionHandler->DoAction_Page(action, CPDF_AAction::ClosePage, pSDKDoc);
       }
     }
   }
 }