The ornamental design for a kindling maul, as shown and described.
FIG. 1 is an upper perspective view of a kindling maul showing my new design.
FIG. 2 is a top view of a kindling maul showing my new design.
FIG. 3 is a bottom view of a kindling maul showing my new design.
FIG. 4 is a right side view of a kindling maul showing my new design.
FIG. 5 is a left side view of a kindling maul showing my new design.
FIG. 6 is a front view of a kindling maul showing my new design; and,
FIG. 7 is a rear view of a kindling maul showing my new design.
Any shading and cross-hatching are not features of the design but are utilized to illustrate the surface contours of the kindling maul in the drawings.
The broken line showing of an exemplary handle is included for the purpose of illustrating environmental structure and forms no part of the claimed design.