tremolo: Fix Index out of bounds in oggpack_look am: 8258a4bf67

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/tremolo/+/13163346

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I9824b1f5240ebb72df0e1311a41eabdb5edd18f8