The ornamental design for an irrigationcontroller, as shown and described.
FIG. 1 is a first top perspective view of an irrigation controller according to our new design;
FIG. 2 is a second top perspective view of the irrigation controller;
FIG. 3 is a first bottom perspective view of the irrigation controller;
FIG. 4 is a second bottom perspective view of the irrigation controller;
FIG. 5 is a front side elevational view of the irrigation controller;
FIG. 6 is a top side view of the irrigation controller;
FIG. 7 is a bottom side view of the irrigation controller;
FIG. 8 is a right side elevational view of the irrigation controller; and,
FIG. 9 is a left side elevational view of the irrigation controller.
The broken lines in the figures are included for the purpose of illustrating unclaimed portions of the irrigation controller and form no part of the claimed design. The rear side views of the irrigation controller are not included as no portion of the rear side of the irrigation controller is claimed.