The ornamental design for a sprinklerguard, as shown and described.
FIG. 1 is a top front perspective view of a sprinkler guard showing my new
design. The broken line is for illustrative purposes only and forms no
part of the claimed design;
FIG. 2 is a top view of the sprinkler guard;
FIG. 3 is a back view;
FIG. 4 is a side view showing the side opposite the side shown in FIG. 1;
and,