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

fpdfsdk/src/pdfwindow/PWL_EditCtrl.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 "fpdfsdk/include/pdfwindow/PDFWindow.h"
 #include "fpdfsdk/include/pdfwindow/PWL_Caret.h"
 #include "fpdfsdk/include/pdfwindow/PWL_EditCtrl.h"
 #include "fpdfsdk/include/pdfwindow/PWL_FontMap.h"
 #include "fpdfsdk/include/pdfwindow/PWL_ScrollBar.h"
 #include "fpdfsdk/include/pdfwindow/PWL_Utils.h"
 #include "fpdfsdk/include/pdfwindow/PWL_Wnd.h"
 
 #define IsFloatZero(f) ((f) < 0.0001 && (f) > -0.0001)
 #define IsFloatBigger(fa, fb) ((fa) > (fb) && !IsFloatZero((fa) - (fb)))
 #define IsFloatSmaller(fa, fb) ((fa) < (fb) && !IsFloatZero((fa) - (fb)))
 #define IsFloatEqual(fa, fb) IsFloatZero((fa) - (fb))
 
 /* ---------------------------- CPWL_EditCtrl ------------------------------ */
 
 CPWL_EditCtrl::CPWL_EditCtrl()
     : m_pEdit(NULL),
       m_pEditCaret(NULL),
       m_bMouseDown(FALSE),
       m_pEditNotify(NULL),
       m_nCharSet(DEFAULT_CHARSET),
       m_nCodePage(0) {
   m_pEdit = IFX_Edit::NewEdit();
-  ASSERT(m_pEdit != NULL);
+  ASSERT(m_pEdit);
 }
 
 CPWL_EditCtrl::~CPWL_EditCtrl() {
   IFX_Edit::DelEdit(m_pEdit);
 }
 
 void CPWL_EditCtrl::OnCreate(PWL_CREATEPARAM& cp) {
   cp.eCursorType = FXCT_VBEAM;
 }
 
@@ skipping 579 matching lines @@
   CPVT_WordPlace wpEnd = m_pEdit->WordIndexToWordPlace(nEndChar);
   return m_pEdit->GetRangeText(CPVT_WordRange(wpStart, wpEnd));
 }
 
 void CPWL_EditCtrl::SetReadyToInput() {
   if (m_bMouseDown) {
     ReleaseCapture();
     m_bMouseDown = FALSE;
   }
 }