The ornamental design for a hairroller, as shown and described.
FIG. 1 is a front, top and right side isometric projection view of a hair
roller showing the present design;
FIG. 2 is a front elevational view of the hair roller; and,
FIG. 3 is a rear, bottom and left side isometric projection view of the
hair roller.
The partially disclosed structures on the interior surface of the roller
follow the configuration of the portions shown; the annular arrangement of
slots thereon being symmetrical.