The ornamental design for an irrigationsprinkler, as shown and described.
FIG. 1 is a top, front and left side perspective view of an irrigation sprinkler showing my new design;
FIG. 2 is a bottom and rear perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a right side elevation view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines shown in the drawings depict portions of the irrigation sprinkler in which the design is embodied that form no part of claimed design.