Fix Regression: Incomplete file loading is seen for multi page pdf files.

core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.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_parser.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fpdfapi/fpdf_page.h"
 #include "../../../../third_party/numerics/safe_math.h"
@@ skipping 1024 matching lines @@
         CPDF_Object* pStartNumObj = NULL;
         CPDF_Object* pCountObj = NULL;
         for (FX_DWORD i = 0; i < nPairSize; i++) {
             pStartNumObj = pArray->GetElement(i * 2);
             pCountObj = pArray->GetElement(i * 2 + 1);
             if (pStartNumObj && pStartNumObj->GetType() == PDFOBJ_NUMBER
                 && pCountObj && pCountObj->GetType() == PDFOBJ_NUMBER) {
                 arrIndex.push_back(std::make_pair(pStartNumObj->GetInteger(), pCountObj->GetInteger()));
             }
         }
-        nSegs = arrIndex.size();
-        if (nSegs == 0) {
-            arrIndex.push_back(std::make_pair(0, size));
-            nSegs = 1;
-        }
+    } else {
+        arrIndex.push_back(std::make_pair(0, size));
     }
+    nSegs = arrIndex.size();

[jun_fang, 2014/09/18 18:00:22]

arrIndex may be empty here. If it's empty, we should add the default value (0,
size) into arrIndex. 

     pArray = pStream->GetDict()->GetArray(FX_BSTRC("W"));
     if (pArray == NULL) {
         pStream->Release();
         return FALSE;
     }
     CFX_DWordArray WidthArray;
     FX_SAFE_DWORD dwAccWidth = 0;
     for (FX_DWORD i = 0; i < pArray->GetCount(); i ++) {
         WidthArray.Add(pArray->GetInteger(i));
         dwAccWidth += WidthArray[i];
@@ skipping 3375 matching lines @@
 {
     FX_INT32 iSize = m_childNode.GetSize();
     for (FX_INT32 i = 0; i < iSize; ++i) {
         CPDF_PageNode *pNode = (CPDF_PageNode*)m_childNode[i];
         if (pNode) {
             delete pNode;
         }
     }
     m_childNode.RemoveAll();
 }