I claim the ornamental design for a goggle stopper, as shown and described.
FIG. 1 is a perspective view of a goggle stopper.
FIG. 2 is a top view of a goggle stopper.
FIG. 3 is a bottom view of a goggle stopper.
FIG. 4 is a front view of a goggle stopper.
FIG. 5 is a side view of a goggle stopper
FIG. 6 is another side view of a goggle stopper; and,
FIG. 7 is a side view of a goggle stopper in use on an article of headwear.
The goggle stopper is shown with a symbolic break in its length. The appearance of any portion of the goggle stopper between the break lines forms no part of the claimed design.