Fix for [ 907679 ] segfault on SetSizerAndFit after SetSizer

Don't do anything if setting the same sizer again.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@26045 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/wincmn.cpp

@@ -1429,6 +1429,9 @@ void wxWindowBase::DeleteRelatedConstraints()
 
 void wxWindowBase::SetSizer(wxSizer *sizer, bool deleteOld)
 {
+    if ( sizer == m_windowSizer)
+        return;
+    
     if ( deleteOld )
         delete m_windowSizer;