The ornamental design for a quilttemplate, as shown and described.
FIG. 1 is a top view of my quilt template design showing my instructive lettering and numbers in the English language, but such are for illustrative purposes only and may take other language forms;
FIG. 2 is a right side view of my quilt template design, with the left and rear side views being the same; and,
FIG. 3 is a bottom view of my quilt template design showing the English language numbers and lettering in reverse when viewed through the clear acrylic from the bottom. The bottom surface of my new template design is flat and otherwise unornamented.
The broken line showing of cutting guides are included for the purpose of illustrating non-claimed subject matter and forms no part of the claimed design.