I claim the ornamental design for a wall fixture, as shown and described.
FIG. 1 is a perspective view of an embodiment of the claimed design;
FIG. 2 is a front view of the claimed design shown in FIG. 1;
FIG. 3 is a rear view of the claimed design shown in FIG. 1;
FIG. 4 is a right side view of the claimed design shown in FIG. 1;
FIG. 5 is left side view of the claimed design shown in FIG. 1;
FIG. 6 is a top view of the claimed design shown in FIG. 1; and,
FIG. 7 is a bottom view of the claimed design shown in FIG. 1.
The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design. The dot-dash lines in the drawings define boundaries of the claimed design and form no part thereof.