set m_isBeingDeleted to true (only) in SendDestroyEvent(); call it as early as possible during the window destruction to ensure that destroy event handlers can still access the full window object

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58246 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/dfb/window.cpp

@@ -88,8 +88,6 @@ wxWindowDFB::~wxWindowDFB()
 {
     SendDestroyEvent();
 
-    m_isBeingDeleted = true;
-
     if ( gs_mouseCapture == this )
         ReleaseMouse();