Make conversion to CPDF_Dest explicit

core/src/fpdfdoc/doc_link.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/fpdfdoc/fpdf_doc.h"
 #include "../../src/fxcrt/fx_safe_types.h"
 
 CPDF_LinkList::~CPDF_LinkList()
@@ skipping 72 matching lines @@
     }
 }
 CPDF_Rect CPDF_Link::GetRect()
 {
     return m_pDict->GetRect("Rect");
 }
 CPDF_Dest CPDF_Link::GetDest(CPDF_Document* pDoc)
 {
     CPDF_Object* pDest = m_pDict->GetElementValue("Dest");
     if (pDest == NULL) {
-        return NULL;
+        return CPDF_Dest();
     }
     if (pDest->GetType() == PDFOBJ_STRING || pDest->GetType() == PDFOBJ_NAME) {
         CPDF_NameTree name_tree(pDoc, FX_BSTRC("Dests"));
         CFX_ByteStringC name = pDest->GetString();
-        return name_tree.LookupNamedDest(pDoc, name);
-    } else if (pDest->GetType() == PDFOBJ_ARRAY) {
-        return (CPDF_Array*)pDest;
+        return CPDF_Dest(name_tree.LookupNamedDest(pDoc, name));
     }
-    return NULL;
+    if (pDest->GetType() == PDFOBJ_ARRAY) {
+        return CPDF_Dest((CPDF_Array*)pDest);
+    }
+    return CPDF_Dest();
 }
 CPDF_Action CPDF_Link::GetAction()
 {
     return CPDF_Action(m_pDict->GetDict("A"));
 }