Resolve compilation error with G++ 4.9.

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 2174 matching lines @@
             }
             nKeys ++;
             key = PDF_NameDecode(key);
             if (key == FX_BSTRC("/Contents")) {
                 dwSignValuePos = m_Pos;
             }
             CPDF_Object* pObj = GetObject(pObjList, objnum, gennum, level + 1);
             if (pObj == NULL) {
                 continue;
             }
-            if (key.GetLength() == 1) {
-                pDict->SetAt(CFX_ByteStringC(((FX_LPCSTR)key) + 1, key.GetLength() - 1), pObj);
-            } else {
+            if (key.GetLength() >= 1) {
                 if (nKeys < 32) {
                     pDict->SetAt(CFX_ByteStringC(((FX_LPCSTR)key) + 1, key.GetLength() - 1), pObj);
                 } else {
                     pDict->AddValue(CFX_ByteStringC(((FX_LPCSTR)key) + 1, key.GetLength() - 1), pObj);
                 }
             }
         }
         if (IsSignatureDict(pDict)) {
             FX_FILESIZE dwSavePos = m_Pos;
             m_Pos = dwSignValuePos;
@@ skipping 2225 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();
 }