The ornamental design for a projector, as shown and described.
FIG. 1 is a top front perspective view of a projector showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a right side view thereof when a supporter is combined with the present projector.
The broken lines showing in FIGS. 4 and 7 represent an unclaimed portion of the projector and the dashed-dot-dot lines showing in FIG. 8 is included for the purpose of illustrating environment. None of the broken lines form part of the claimed design.