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
// 8-bit PCM audio uses 1 byte per sample/sample block, not 2 like other formats.