The ornamental design for a saddle-shaped air conditioner, as shown and described.
FIG. 1 is a perspective view of the saddle-shaped air conditioner showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a schematic view of the saddle-shaped air conditioner secured on a window frame.
The broken lines in the drawings illustrate portions of the saddle-shaped air conditioner and its environment which forms no part of the claimed design.