We claim the ornamental design for an inner corner baseboard member, as shown and described.
FIG. 1 is a top front perspective view of an embodiment of an inner corner baseboard member of the present invention;
FIG. 2 is a top rear perspective view thereof;
FIG. 3 is a first side view thereof;
FIG. 4 is a second side view thereof;
FIG. 5 is a third side view thereof;
FIG. 6 is a fourth side view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
The ornamental design which is claimed is shown in solid lines in the drawings. Any broken lines in the drawings are for illustrative purposes only and form no part of the claimed design.