We claim the ornamental design for a door, as shown and described.
FIG. 1 is an isometric view of a door.
FIG. 2 is a front view of the door of FIG. 1.
FIG. 3 is an enlarged fragmentary section view of the door of FIG. 1, taken along line 3-3 of FIG. 2.
FIG. 4 is a top view of the door of FIG. 1, of which a bottom view is identical; and,
FIG. 5 is a right side view of the door of FIG. 1, of which a left side view is identical.
In FIG. 3, the lateral broken lines depict the limits of the enlarged view taken from FIG. 2. The middle wavy broken lines and broken-line hatching indicating a sectional view are not intended to illustrate the internal construction of the door. The aforementioned broken lines form no part of the claimed design.