Cast this to wxWindow* for passing to destroyEvent

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@19622 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/x11/window.cpp

@@ -341,7 +341,7 @@ bool wxWindowX11::Create(wxWindow *parent, wxWindowID id,
 wxWindowX11::~wxWindowX11()
 {
     // Send destroy event
-    wxWindowDestroyEvent destroyEvent(this);
+    wxWindowDestroyEvent destroyEvent((wxWindow*) this);
     destroyEvent.SetId(GetId());
     GetEventHandler()->ProcessEvent(destroyEvent);