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