Remove "this==NULL" and adjust corresponding callers

core/src/fpdfapi/fpdf_page/fpdf_page_func.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/fpdfapi/fpdf_page.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "pageint.h"
 #include <limits.h>
@@ skipping 468 matching lines @@
     CPDF_Array* pEncode = pDict->GetArray(FX_BSTRC("Encode"));
     CPDF_Array* pDecode = pDict->GetArray(FX_BSTRC("Decode"));
     m_nBitsPerSample = pDict->GetInteger(FX_BSTRC("BitsPerSample"));
     m_SampleMax = 0xffffffff >> (32 - m_nBitsPerSample);
     m_pSampleStream = FX_NEW CPDF_StreamAcc;
     m_pSampleStream->LoadAllData(pStream, FALSE);
     m_pEncodeInfo = FX_Alloc(SampleEncodeInfo, m_nInputs);
     int i;
     FX_DWORD nTotalSamples = 1;
     for (i = 0; i < m_nInputs; i ++) {
-        m_pEncodeInfo[i].sizes = pSize->GetInteger(i);
+        m_pEncodeInfo[i].sizes = pSize ? pSize->GetInteger(i) : 0;
         if (!pSize && i == 0) {
             m_pEncodeInfo[i].sizes = pDict->GetInteger(FX_BSTRC("Size"));
         }
         if (nTotalSamples > 0 && (FX_UINT32)(m_pEncodeInfo[i].sizes) > UINT_MAX / nTotalSamples) {
             return FALSE;
         }
         nTotalSamples *= m_pEncodeInfo[i].sizes;
         if (pEncode) {
             m_pEncodeInfo[i].encode_min = pEncode->GetFloat(i * 2);
             m_pEncodeInfo[i].encode_max = pEncode->GetFloat(i * 2 + 1);
@@ skipping 377 matching lines @@
         for (int i = 0; i < m_nOutputs; i ++) {
             if (results[i] < m_pRanges[i * 2]) {
                 results[i] = m_pRanges[i * 2];
             } else if (results[i] > m_pRanges[i * 2 + 1]) {
                 results[i] = m_pRanges[i * 2 + 1];
             }
         }
     }
     return TRUE;
 }