I claim the ornamental design for a downspout section, as shown.
FIG. 1 is a perspective view of the downspout section;
FIG. 2 is a front view of the downspout section;
FIG. 3 is a back view of the downspout section;
FIG. 4 is a top view of the downspout section;
FIG. 5 is a bottom view of the downspout section; the structure shown in phantom forming no part of the claimed design;
FIG. 6 is a right side view of the downspout section, the left side view being a mirror image thereof; and,
FIG. 7 is a cross-sectional view of the downspout section taken substantially along line 7—7 in FIG. 1; the structure shown in phantom forming no part of the claimed design.