Remove NULL in xfa/

xfa/fwl/basewidget/fwl_monthcalendarimp.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 "xfa/fwl/basewidget/fwl_monthcalendarimp.h"
 
 #include <algorithm>
 
@@ skipping 217 matching lines @@
   }
   ClearDateItem();
   ReSetDateItem();
   LayOut();
   return FWL_Error::Succeeded;
 }
 FWL_Error CFWL_MonthCalendarImp::DrawWidget(CFX_Graphics* pGraphics,
                                             const CFX_Matrix* pMatrix) {
   if (!pGraphics)
     return FWL_Error::Indefinite;
-  if (m_pProperties->m_pThemeProvider == NULL) {
+  if (!m_pProperties->m_pThemeProvider) {
     m_pProperties->m_pThemeProvider = GetAvailableTheme();
   }
   IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
   if (HasBorder()) {
     DrawBorder(pGraphics, CFWL_Part::Border, pTheme, pMatrix);
   }
   if (HasEdge()) {
     DrawEdge(pGraphics, CFWL_Part::Edge, pTheme, pMatrix);
   }
   DrawBkground(pGraphics, pTheme, pMatrix);
@@ skipping 954 matching lines @@
                            uint32_t dwSt,
                            CFX_RectF rc,
                            CFX_WideString& wsday)
     : iDay(day),
       iDayOfWeek(dayofweek),
       dwStates(dwSt),
       rect(rc),
       wsDay(wsday) {}
 
 FWL_DATEINFO::~FWL_DATEINFO() {}