The ornamental design for a miter saw, as shown and described.
FIG. 1 is a perspective view of a miter saw according to the invention.
FIG. 2 is a front view of the miter saw of FIG. 1.
FIG. 3 is a rear view of the miter saw of FIG. 1.
FIG. 4 is a left side view of the miter saw of FIG. 1.
FIG. 5 is a right side view of the miter saw of FIG. 1; and,
FIG. 6 is a top plan view of the miter saw of FIG. 1.
The broken lines in FIGS. 2 and 4-5 are for the purpose of illustrating non-essential portions of the claimed design and thus form no part of the claimed design.