- Member Pango::AttrList::operator bool  ()
- Use the const version  
- Member Pango::Color::operator bool  ()
- Use the const version.  
- Member Pango::Coverage::create  (const guchar * bytes, int n_bytes)
- This returns an empty RefPtr. 
- Member Pango::Coverage::max  (const Glib::RefPtr< Coverage > & other) const
- This function does nothing. 
- Member Pango::Coverage::to_bytes  () const
- This returns an empty array.  
- Member Pango::Layout::get_iter  (LayoutIter & iter)
- Use the get_iter() that returns the LayoutIter instead of using an output parameter.