The ornamental design for a wallplate for a lighting fixture, as shown and described.
FIG. 1 is a front elevational view of a wall plate for a lighting fixture
showing my new design, the broken lines indicating that the braided
pattern is continued around the fixture;
FIG. 2 is a left side elevational view thereof, the right side elevational
view being a mirror image thereof;
FIG. 3 is a top view thereof, the bottom view being identical thereto; and,