The ornamental design for a spout, as shown and described.
FIG. 1 is a perspective view of a spout 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 another perspective view thereof, with a pressure balance mixing valve and shower head engaged.
The dotted line showing of the spout discharge, the wall, the pressure balance mixing valve and the shower head is for illustrative purposes only and forms no part of the claimed design.