Fix AABB tree

AABB_tree/include/CGAL/internal/AABB_tree/AABB_search_tree.h

@@ -65,6 +65,9 @@ namespace CGAL
                           m_id = rhs.m_id;
                     }
 
+#ifndef CGAL_CFG_NO_CPP0X_DELETED_AND_DEFAULT_FUNCTIONS
+                  Decorated_point& operator=(const Decorated_point&)=default;
+#endif
                 private:
                     Id m_id;