XFA: More underlying types

fpdfsdk/src/fpdfsave.cpp

Index: fpdfsdk/src/fpdfsave.cpp
diff --git a/fpdfsdk/src/fpdfsave.cpp b/fpdfsdk/src/fpdfsave.cpp
index 882161c8fe39c209e4c75d5c69c365c5fc66344a..f643f704d7ea0bdaf09cf3586b7ff9465259f724 100644
--- a/fpdfsdk/src/fpdfsave.cpp
+++ b/fpdfsdk/src/fpdfsave.cpp
@@ -284,16 +284,14 @@ FPDF_BOOL _FPDF_Doc_Save(FPDF_DOCUMENT document,
                          FPDF_DWORD flags,
                          FPDF_BOOL bSetVersion,
                          int fileVerion) {
-  CPDFXFA_Document* pDoc = (CPDFXFA_Document*)document;
+  CPDF_Document* pPDFDoc = CPDFDocumentFromFPDFDocument(document);
+  if (!pPDFDoc)
+    return 0;
 
+  CPDFXFA_Document* pDoc = (CPDFXFA_Document*)document;
   CFX_PtrArray fileList;
-
   _SendPreSaveToXFADoc(pDoc, fileList);
 
-  CPDF_Document* pPDFDoc = pDoc->GetPDFDoc();
-  if (!pPDFDoc)
-    return 0;
-
   if (flags < FPDF_INCREMENTAL || flags > FPDF_REMOVE_SECURITY) {
     flags = 0;
   }
@@ -305,20 +303,18 @@ FPDF_BOOL _FPDF_Doc_Save(FPDF_DOCUMENT document,
     flags = 0;
     FileMaker.RemoveSecurity();
   }
+
   CFX_IFileWrite* pStreamWrite = NULL;
   FX_BOOL bRet;
   pStreamWrite = new CFX_IFileWrite;
   pStreamWrite->Init(pFileWrite);
   bRet = FileMaker.Create(pStreamWrite, flags);
-
   _SendPostSaveToXFADoc(pDoc);
-
   for (int i = 0; i < fileList.GetSize(); i++) {
     IFX_FileStream* pFile = (IFX_FileStream*)fileList.GetAt(i);
     pFile->Release();
   }
   fileList.RemoveAll();
-
   pStreamWrite->Release();
   return bRet;
 }