[overlay] Replace *begin(rng) with front(rng)

include/boost/geometry/algorithms/detail/overlay/append_no_dups_or_spikes.hpp

@@ -137,7 +137,7 @@ inline void clean_closing_dups_and_spikes(Range& range,
                 // Remove closing last point
                 range::resize(range, boost::size(range) - 1);
                 // Add new closing point
-                range::push_back(range, *boost::begin(range));
+                range::push_back(range, range::front(range));
             }
             found = true;
         }