invalidate field-width cache before refreshing (Mac redraws immediately)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@28874 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/statusbr.cpp

@@ -140,11 +140,11 @@ void wxStatusBarGeneric::SetFieldsCount(int number, const int *widths)
     for (i = m_nFields - 1; i >= number; --i)
         m_statusStrings.RemoveAt(i);
 
-    wxStatusBarBase::SetFieldsCount(number, widths);
-
     // forget the old cached pixel widths
     m_widthsAbs.Empty();
 
+    wxStatusBarBase::SetFieldsCount(number, widths);
+
     wxASSERT_MSG( m_nFields == (int)m_statusStrings.GetCount(),
                   _T("This really should never happen, can we do away with m_nFields here?") );
 }