Rather than going through playlist-type operations. Additionally, I
take this opportunity to change playlist_add() to take a playlist struct
directly.
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>
This pointer can be used immediately by testing code instead of simply
looking at the return status.
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>