Merge to XFA: Make conversion between CPDF_Dest and its object explicit.

Original Review URL: https://codereview.chromium.org/984703004
TBR=thestig@chromium.org

Review URL: https://codereview.chromium.org/984143002
diff --git a/fpdfsdk/src/fsdk_actionhandler.cpp b/fpdfsdk/src/fsdk_actionhandler.cpp
index 5fd6c54..6f8ea0c 100644
--- a/fpdfsdk/src/fsdk_actionhandler.cpp
+++ b/fpdfsdk/src/fsdk_actionhandler.cpp
@@ -565,7 +565,7 @@
 	CPDF_Dest MyDest = action.GetDest(pPDFDocument);
 	int nPageIndex = MyDest.GetPageIndex(pPDFDocument);
 	int nFitType = MyDest.GetZoomMode();
-	const CPDF_Array * pMyArray = (CPDF_Array*)MyDest.m_pObj;
+	const CPDF_Array * pMyArray = (CPDF_Array*)MyDest.GetObject();
 	float* pPosAry = NULL;
 	int sizeOfAry = 0;
 	if (pMyArray != NULL)