atom/new.c: Use exact comparison for atom_NOT_FOUND.
atom/new.c: Use exact comparison for atom_NOT_FOUND.

git-svn-id: cdc0bebbd1dd623b57fb23dd0852a45047305403@181 befe153f-808b-4961-b90b-b6e528e3d82e

dpt/PrivateEye,dpt/PrivateEye