Make conversion to CPDF_Dest explicit

core/src/fpdfdoc/doc_action.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"
 CPDF_Dest CPDF_Action::GetDest(CPDF_Document* pDoc) const
 {
-    if (m_pDict == NULL) {
-        return NULL;
+    if (!m_pDict) {
+        return CPDF_Dest();
     }
     CFX_ByteString type = m_pDict->GetString("S");
     if (type != "GoTo" && type != "GoToR") {
-        return NULL;
+        return CPDF_Dest();
     }
     CPDF_Object* pDest = m_pDict->GetElementValue("D");
-    if (pDest == NULL) {
-        return NULL;
+    if (!pDest) {
+        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();
 }
 const FX_CHAR* g_sATypes[] = {"Unknown", "GoTo", "GoToR", "GoToE", "Launch", "Thread", "URI", "Sound", "Movie",
                               "Hide",   "Named", "SubmitForm", "ResetForm", "ImportData", "JavaScript", "SetOCGState",
                               "Rendition", "Trans", "GoTo3DView", ""
                              };
 CPDF_Action::ActionType CPDF_Action::GetType() const
 {
     ActionType eType = Unknown;
     if (m_pDict != NULL) {
         CFX_ByteString csType = m_pDict->GetString("S");
@@ skipping 316 matching lines @@
         return CPDF_Action();
     }
     return CPDF_Action(pAction->GetDict());
 }
 int CPDF_DocJSActions::FindJSAction(const CFX_ByteString& csName) const
 {
     ASSERT(m_pDocument != NULL);
     CPDF_NameTree name_tree(m_pDocument, FX_BSTRC("JavaScript"));
     return name_tree.GetIndex(csName);
 }