The ornamental design for a projector, as shown and described.
FIG. 1 is a perspective view of a projector showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right view thereof;
FIG. 5 is a left view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a perspective view thereof showing the rotation of certain components of the projector in the directions indicated by arrows; and,
FIG. 9 is a perspective view thereof showing the folded state of the projector.
The broken lines in the drawings depict portions of the projector and form no part of the claimed design. The broken lines with arrows in FIG. 8 are for purposes of illustrating the rotation directions only and form no part of the claimed design.