Take the size of the audio data into account when checking for the loop ...

...address.  Fixes the static audio in the FMV of Megaman X Collection, Pac man World, off pitched instruments in Skies of Arcadia and audio desync in the Taiko no Tatsujin series.

Fixes:
issue 7154
issue 7222
issue 7280
issue 7457
step_bytes_size? Something that indicated better that this actually maps to a size in bytes.