handle child destruction notifications in wxTLW itself and reset both normal and temporary default item pointers when the default window is destroyed

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45275 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/wincmn.cpp

@@ -318,23 +318,9 @@ wxWindowBase::~wxWindowBase()
 
     wxASSERT_MSG( GetChildren().GetCount() == 0, wxT("children not destroyed") );
 
-    // reset the top-level parent's default item if it is this widget
+    // notify the parent about this window destruction
     if ( m_parent )
-    {
-        wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent((wxWindow*)this),
-                                              wxTopLevelWindow);
-
-        if ( tlw && tlw->GetDefaultItem() == this )
-            tlw->SetDefaultItem(NULL);
-        if ( tlw && tlw->GetTmpDefaultItem() == this )
-            tlw->SetTmpDefaultItem(NULL);
-    }
-
-    // reset the dangling pointer our parent window may keep to us
-    if ( m_parent )
-    {
         m_parent->RemoveChild(this);
-    }
 
 #if wxUSE_CARET
     delete m_caret;