Change layout item in CFWL_Widget type from void

xfa/fxfa/app/xfa_fwltheme.cpp

Index: xfa/fxfa/app/xfa_fwltheme.cpp
diff --git a/xfa/fxfa/app/xfa_fwltheme.cpp b/xfa/fxfa/app/xfa_fwltheme.cpp
index 2ca6237109a0c2bd0ef25034d93a226e6a275ee4..5a494f12311924e18b43cb2183d734e7f77dc5ca 100644
--- a/xfa/fxfa/app/xfa_fwltheme.cpp
+++ b/xfa/fxfa/app/xfa_fwltheme.cpp
@@ -38,9 +38,7 @@ CXFA_FFWidget* XFA_ThemeGetOuterWidget(CFWL_Widget* pWidget) {
   CFWL_Widget* pOuter = pWidget;
   while (pOuter && pOuter->GetOuter())
     pOuter = pOuter->GetOuter();
-
-  return pOuter ? static_cast<CXFA_FFWidget*>(pOuter->GetLayoutItem())
-                : nullptr;
+  return pOuter ? pOuter->GetLayoutItem() : nullptr;
 }
 
 CXFA_FWLTheme::CXFA_FWLTheme(CXFA_FFApp* pApp)