Remove "this==NULL" and adjust corresponding callers

fpdfsdk/src/pdfwindow/PWL_Icon.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 "../../include/pdfwindow/PDFWindow.h"
 #include "../../include/pdfwindow/PWL_Wnd.h"
 #include "../../include/pdfwindow/PWL_Icon.h"
 #include "../../include/pdfwindow/PWL_Utils.h"
@@ skipping 142 matching lines @@
         return FALSE;
 }
 
 void CPWL_Icon::GetIconPosition(FX_FLOAT & fLeft, FX_FLOAT & fBottom)
 {
         if (m_pIconFit)
         {
                 //m_pIconFit->GetIconPosition(fLeft,fBottom);
                 fLeft = 0.0f;
                 fBottom = 0.0f;
-                CPDF_Array* pA = m_pIconFit->m_pDict->GetArray("A");
+                CPDF_Array* pA = m_pIconFit->m_pDict ? m_pIconFit->m_pDict->GetArray("A") : NULL;
                 if (pA != NULL)
                 {
                         FX_DWORD dwCount = pA->GetCount();
                         if (dwCount > 0) fLeft = pA->GetNumber(0);
                         if (dwCount > 1) fBottom = pA->GetNumber(1);
                 }
         }
         else
         {
                 fLeft = 0.0f;
@@ skipping 89 matching lines @@
 
         FX_FLOAT fPlateWidth,fPlateHeight;
         CPDF_Rect rcPlate = this->GetClientRect();      
         fPlateWidth = rcPlate.right - rcPlate.left;
         fPlateHeight = rcPlate.top - rcPlate.bottom;
 
         x = (fPlateWidth - fImageFactWidth) * fLeft;
         y = (fPlateHeight - fImageFactHeight)  * fBottom;
 }