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

xfa/src/fxfa/src/parser/xfa_document_serialize.cpp

Index: xfa/src/fxfa/src/parser/xfa_document_serialize.cpp
diff --git a/xfa/src/fxfa/src/parser/xfa_document_serialize.cpp b/xfa/src/fxfa/src/parser/xfa_document_serialize.cpp
index b5eaa5f4c63b1cf536ca7d7f345a6144bfb772ac..bba10ba74e642092ca17b4b98e0810732c7b924d 100644
--- a/xfa/src/fxfa/src/parser/xfa_document_serialize.cpp
+++ b/xfa/src/fxfa/src/parser/xfa_document_serialize.cpp
@@ -42,13 +42,12 @@ FX_BOOL CXFA_DataImporter::ImportData(IFX_FileRead* pDataDocument) {
     return FALSE;
   }
   CXFA_Node* pDataModel =
-      (CXFA_Node*)m_pDocument->GetXFAObject(XFA_HASHCODE_Datasets);
+      ToNode(m_pDocument->GetXFAObject(XFA_HASHCODE_Datasets));
   if (!pDataModel) {
     pDataDocumentParser->Release();
     return FALSE;
   }
-  CXFA_Node* pDataNode =
-      (CXFA_Node*)m_pDocument->GetXFAObject(XFA_HASHCODE_Data);
+  CXFA_Node* pDataNode = ToNode(m_pDocument->GetXFAObject(XFA_HASHCODE_Data));
   if (pDataNode) {
     pDataModel->RemoveChild(pDataNode);
   }
@@ -445,7 +444,7 @@ void XFA_DataExporter_RegenerateFormFile(CXFA_Node* pNode,
     pStream->WriteString(pURI, FXSYS_wcslen(pURI));
     CFX_WideString wsVersionNumber;
     XFA_DataExporter_RecognizeXFAVersionNumber(
-        (CXFA_Node*)pNode->GetDocument()->GetXFAObject(XFA_XDPPACKET_Template),
+        ToNode(pNode->GetDocument()->GetXFAObject(XFA_XDPPACKET_Template)),
         wsVersionNumber);
     if (wsVersionNumber.IsEmpty()) {
       wsVersionNumber = FX_WSTRC(L"2.8");