In Rance 9 (and Blade Briders), KiwiSoundEngine looks up BGM and sound
files in archives by name formatted as "%05d" rather than by archive
index. Since the Sound_Seek function only exists in these games' HLL
definitions, its presence is used to switch Music_IsExist, Music_Prepare,
Sound_IsExist and Sound_Prepare to name-based lookups at PreLink time.