The ornamental design for a housing, as shown and described.
FIG. 1 is a perspective view from below of a housing in accordance with my design;
FIG. 2 is a reduced top plan view of the housing in accordance with my design;
FIG. 3 is a reduced bottom plan view of the housing in accordance with my design;
FIG. 4 is a greatly enlarged side elevation view of the housing in accordance with my design, all side views being substantially identical to that shown; and,
FIG. 5 is an enlarged side elevation view of the housing in accordance with my design, all side views being substantially identical to that shown.
The broken line showing of the support rod, the upper portion of a ceiling fan housing, fan blades, fan blade ornamentation, finial, light fixture and blade irons is included for the purpose of illustrating environmental structure and forms no part of the claimed design.