crash when deleting window in OnUnsplit() corrected

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4590 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/splitter.cpp

@@ -893,8 +893,7 @@ void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
     // for compatibility, call the virtual function
     OnDoubleClickSash(event.GetX(), event.GetY());
 
-    if ( GetMinimumPaneSize() == 0
-        || m_permitUnsplitAlways)
+    if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
     {
         Unsplit();
     }
@@ -904,8 +903,9 @@ void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
 {
     wxWindow *win = event.GetWindowBeingRemoved();
 
+    // do it before calling OnUnsplit() which may delete the window
+    win->Show(FALSE);
+
     // for compatibility, call the virtual function
     OnUnsplit(win);
-
-    win->Show(FALSE);
 }