The ornamental design for a charger for an ostomyappliance, as shown and described.
FIG. 1 is a perspective view of a charger for an ostomy appliance showing a new design;
FIG. 2 is a front side elevation view thereof;
FIG. 3 is a back side elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a top side elevation view thereof; and,
FIG. 7 is a bottom side elevation view thereof.
The broken lines on the charger depict portions of a charger for an ostomy appliance that form no part of the claimed design. In FIGS. 1-7, the broken lines showing an ostomy appliance and a cord depict environmental subject matter only and form no part of the claimed design.