Retrieves the owner of a horse.
The object whose owner is required.
This function will return the owner of the target if it is a valid horse.
If there is no owner, or the target is not a valid horse, it will return OBJECT_INVALID.
Note that this cannot be used when a rider is mounted, because the horse object doesn't exist at that time.
#include " x3_inc_horse "
author: Proleric, editor: Mistress