The ornamental design for a vendingmachine, as shown and described.
FIG. 1 is a perspective view of a vending machine showing my new design;
and,
FIG. 2 is a front elevational view thereof.
The undisclosed left side view is a mirror image of the right side view;
and the rear view is the same as the right side view except for the coin
receptor.
The undisclosed bottom view forms no part of the claimed design.