The ornamental design for a sprayer, as shown and described.
FIG. 1 is a front and top perspective view of a sprayer, showing my new design;
FIG. 2 is a rear and bottom perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof; and,
FIG. 9 is an enlarged detail view of area 9 circumscribed in FIG. 1.
The evenly spaced broken lines in the figures depict portions of the sprayer that form no part of the claimed design. The dash dot dash lines in FIGS. 1 and 9 depict the boundary lines of the enlarged view and form no part of the claim.