recompute width cache if client width has changed to take into account the fact

that derived OnSize is run before cache has been cleared in own OnSize


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@17929 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/statusbr.h

@@ -108,6 +108,8 @@ protected:
 
   wxArrayString     m_statusStrings;
 
+  // the last known width of the client rect (used to rebuild cache)
+  int               m_lastClientWidth;
   // the widths of the status bar panes in pixels
   wxArrayInt        m_widthsAbs;