Various changes to JBig2 cache:

core/src/fxcodec/jbig2/JBig2_Segment.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 "JBig2_Segment.h"
 
 #include "../../../include/fxcrt/fx_memory.h"
 
 CJBig2_Segment::CJBig2_Segment() {
   m_dwNumber = 0;
   m_cFlags.c = 0;
   m_nReferred_to_segment_count = 0;
   m_pReferred_to_segment_numbers = NULL;
   m_dwPage_association = 0;
   m_dwData_length = 0;
   m_dwHeader_Length = 0;
-  m_pData = NULL;
+  m_dwObjNum = 0;
+  m_dwDataOffset = 0;
   m_State = JBIG2_SEGMENT_HEADER_UNPARSED;
   m_nResultType = JBIG2_VOID_POINTER;
   m_Result.vd = NULL;
 }
 CJBig2_Segment::~CJBig2_Segment() {
   FX_Free(m_pReferred_to_segment_numbers);
 
   switch (m_nResultType) {
     case JBIG2_IMAGE_POINTER:
       delete m_Result.im;
       break;
     case JBIG2_SYMBOL_DICT_POINTER:
       delete m_Result.sd;
       break;
     case JBIG2_PATTERN_DICT_POINTER:
       delete m_Result.pd;
       break;
     case JBIG2_HUFFMAN_TABLE_POINTER:
       delete m_Result.ht;
       break;
     default:
       FX_Free(m_Result.vd);
   }
 }