The ornamental design for a projector, as shown and described.
FIG. 1 is a front perspective view of a projector with a cover in a closed position;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left-side view thereof;
FIG. 6 is a right-side view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a bottom view thereof;
FIG. 9 is a rear perspective view thereof, with the cover in an open position; and,
FIG. 10 is a left-side view thereof, with the cover in an open position.
The broken lines immediately adjacent to the shaded areas in FIGS. 4 and 8 represent the boundaries of the design. The broken lines represent the portions of the design that form no part of the claim. None of the broken lines form part of the claimed invention.