The ornamental design for a burner, as shown and described.
FIG. 1 is a top perspective view of a burner showing my new design. The broken lines illustrating the surface treatment of the burner membrane form no part of the claimed design.
FIG. 2 is a front view of the burner shown in FIG. 1, with the unillustrated rear view being a mirror image thereof;
FIG. 3 is a top plan view of the burner shown in FIG. 1 with the broken lines illustrating the surface treatment of the burner membrane forming no part of the claimed design; and,
FIG. 4 is a bottom plan view of the burner shown in FIG. 1. The broken lines showing the central circular portion form no part of the claimed design.
The broken lines shown are included for the purpose of illustrating a portion of the burner that forms no part of the claimed design.