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

fpdfsdk/src/pdfwindow/PWL_Label.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_Label.h"
 #include "fpdfsdk/include/pdfwindow/PWL_Utils.h"
 #include "fpdfsdk/include/pdfwindow/PWL_Wnd.h"
 
 /* ---------------------------- CPWL_Label ------------------------------ */
 
 CPWL_Label::CPWL_Label() : m_pEdit(NULL) {
   m_pEdit = IFX_Edit::NewEdit();
-
-  ASSERT(m_pEdit != NULL);
+  ASSERT(m_pEdit);
 }
 
 CPWL_Label::~CPWL_Label() {
   IFX_Edit::DelEdit(m_pEdit);
 }
 
 CFX_ByteString CPWL_Label::GetClassName() const {
   return "CPWL_Label";
 }
 
@@ skipping 117 matching lines @@
 void CPWL_Label::SetLimitChar(int32_t nLimitChar) {
   m_pEdit->SetLimitChar(nLimitChar);
 }
 
 int32_t CPWL_Label::GetTotalWords() {
   if (m_pEdit)
     return m_pEdit->GetTotalWords();
 
   return 0;
 }