IsMounted.GetMountBuffInfo
From WoWWiki
This article is a part of the documentation of the IsMounted function library
IsMounted.GetMountBuffInfo( string unit )
EX: local speed, slot = IsMounted.GetMountBuffInfo("player")
Returns:
(Number speed, Number slot)
speed - percent speed increase of the mount (60 or 100) if unit is mounted,
false if mount is not found
slot - the buff slot id of the mount, nil if mount is not found or unit doesn't exist
