Call CXFA_Object::ToNode() rather than C-style casting.

xfa/src/fxfa/src/parser/xfa_script_signaturepseudomodel.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 "xfa/src/foxitlib.h"
 #include "xfa/src/fxfa/src/common/xfa_utils.h"
 #include "xfa/src/fxfa/src/common/xfa_object.h"
 #include "xfa/src/fxfa/src/common/xfa_document.h"
@@ skipping 17 matching lines @@
     ThrowScriptErrorMessage(XFA_IDS_INCORRECT_NUMBER_OF_METHOD, L"verify");
     return;
   }
   IXFA_Notify* pNotify = m_pDocument->GetParser()->GetNotify();
   if (!pNotify) {
     return;
   }
   IXFA_Doc* hDoc = pNotify->GetHDOC();
   CXFA_Node* pNode = NULL;
   if (iLength >= 1) {
-    pNode = (CXFA_Node*)pArguments->GetObject(0);
+    pNode = static_cast<CXFA_Node*>(pArguments->GetObject(0));
   }
   int32_t bVerify = pNotify->GetDocProvider()->Verify(hDoc, pNode);
   FXJSE_HVALUE hValue = pArguments->GetReturnValue();
   if (hValue) {
     FXJSE_Value_SetInteger(hValue, bVerify);
   }
 }
 void CScript_SignaturePseudoModel::Script_SignaturePseudoModel_Sign(
     CFXJSE_Arguments* pArguments) {
   int32_t iLength = pArguments->GetLength();
@@ skipping 52 matching lines @@
     return;
   }
   IXFA_Notify* pNotify = m_pDocument->GetParser()->GetNotify();
   if (!pNotify) {
     return;
   }
   IXFA_Doc* hDoc = pNotify->GetHDOC();
   CXFA_Node* pNode = NULL;
   FX_BOOL bClear = TRUE;
   if (iLength >= 1) {
-    pNode = (CXFA_Node*)pArguments->GetObject(0);
+    pNode = static_cast<CXFA_Node*>(pArguments->GetObject(0));
   }
   if (iLength >= 2) {
     bClear = pArguments->GetInt32(1) == 0 ? FALSE : TRUE;
   }
   FX_BOOL bFlag = pNotify->GetDocProvider()->Clear(hDoc, pNode, bClear);
   FXJSE_HVALUE hValue = pArguments->GetReturnValue();
   if (hValue) {
     FXJSE_Value_SetBoolean(hValue, bFlag);
   }
 }