We claim the ornamental design for a garden lopper, as shown and described.
FIG. 1 is a front perspective view of the claimed design;
FIG. 2 is a rear perspective view of the claimed design of FIG. 1;
FIG. 3 is a rear elevation perspective view of the claimed design of FIG. 1;
FIG. 4 is front elevation view of the claimed design of FIG. 1;
FIG. 5 is a left side view of the claimed design of FIG. 1;
FIG. 6 is a right side view of the claimed design of FIG. 1;
FIG. 7 is a top view of the claimed design of FIG. 1; and,
FIG. 8 is a bottom view of the claimed design of FIG. 1.
The article is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.