Fix a parsing error: when CGAL_NO_DEPRECATED_CODE is define, the namespace

CGAL was not closed... then the compiler complains about namespaces
CGAL::std::, CGAL::CGAL:: and so on.

Alpha_shapes_3/include/CGAL/Weighted_alpha_shape_euclidean_traits_3.h

@@ -35,8 +35,8 @@ class Weighted_alpha_shape_euclidean_traits_3 : public
 Regular_triangulation_euclidean_traits_3<K>
 {};
 
-} //namespace CGAL
 #endif //CGAL_NO_DEPRECATED_CODE
   
+} //namespace CGAL
   
 #endif //CGAL_WEIGHTED_ALPHA_SHAPE_EUCLIDEAN_TRAITS_3_H