ancillary change related to removal of boost::optional<Rect>
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@ -240,7 +240,7 @@ Push2Knob::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) con
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Push2Knob::compute_bounding_box () const
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{
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if (!_canvas || _r == 0) {
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_bounding_box = boost::optional<Rect> ();
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_bounding_box = Rect ();
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_bounding_box_dirty = false;
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return;
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}
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