Clean up XFA code which causes warnings

xfa/fxfa/app/xfa_ffdocview.cpp

Index: xfa/fxfa/app/xfa_ffdocview.cpp
diff --git a/xfa/fxfa/app/xfa_ffdocview.cpp b/xfa/fxfa/app/xfa_ffdocview.cpp
index faf5c8baff853d914afbca428af8c5f6a174faca..4ecc83eef3755f3b7b68c1ce4cbfc340dc4bc8b6 100644
--- a/xfa/fxfa/app/xfa_ffdocview.cpp
+++ b/xfa/fxfa/app/xfa_ffdocview.cpp
@@ -885,9 +885,9 @@ CXFA_WidgetAcc* CXFA_WidgetAccIterator::MoveToNext() {
   CXFA_Node* pItem = m_pCurWidgetAcc ? m_ContentIterator.MoveToNext()
                                      : m_ContentIterator.GetCurrent();
   while (pItem) {
-    if ((m_pCurWidgetAcc = (CXFA_WidgetAcc*)pItem->GetWidgetData())) {
+    m_pCurWidgetAcc = (CXFA_WidgetAcc*)pItem->GetWidgetData();
+    if (m_pCurWidgetAcc)
       return m_pCurWidgetAcc;
-    }
     pItem = m_ContentIterator.MoveToNext();
   }
   return NULL;