The ornamental design for a latticework, as shown and described.
FIG. 1 is a perspective view along a downwardly slanted direction toward the see thru side (viewers side) of the present lattice work;
FIG. 2 is a perspective view along a downwardly slanted direction toward the view blocking side of the present lattice work;
FIG. 3 is a straight on view of the viewers side of the present lattice work; and,
FIG. 4 is a straight on view of the view blocking side of the present lattice work.
The broken line shown in the drawing views is included for the purpose of illustrating a portion of the lattice that forms no part of the claimed design.