The ornamental design for a garmenthanger, as shown and described.
FIG. 1 is a perspective view of a garment hanger according to the new design;
FIG. 2 is a front view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a right-side view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a bottom view thereof; and,
FIG. 7 is a left-side view thereof.
FIG. 1 illustrates the garment hanger in a closed condition and FIGS. 2-7 illustrate the garment hanger in an open condition. The hook portion of the garment hanger that is shown in blue wash is excluded from protection.