Don't delete smart pointers.
Don't delete smart pointers.

Thanks Chytu:
http://www.pcl-users.org/Seg-fault-while-using-VTK-Smoother-tp3380114p3381648.html

git-svn-id: 1af002208e930b4d920e7c2b948d1e98a012c795@2642 a9d63959-f2ad-4865-b262-bf0e56cfafb6

psoetens/pcl-svn,psoetens/pcl-svn,psoetens/pcl-svn,psoetens/pcl-svn,psoetens/pcl-svn