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/motif/frame.cpp

@@ -253,7 +253,7 @@ bool wxFrame::XmDoCreateTLW(wxWindow* WXUNUSED(parent),
 
 wxFrame::~wxFrame()
 {
-    m_isBeingDeleted = true;
+    SendDestroyEvent();
 
     if (m_clientArea)
     {