sonivox: Fix global buffer overflow in WT_InterpolateNoLoop am: 8bfcd9c03a am: 471c3bc380 am: 393f0fee8a am: 3310782787 am: bb6bb3aba8 am: 7f5ca1faec am: 8014baa634 am: d2c76abb15 am: 2c84596cb8

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/sonivox/+/15249031

Change-Id: I6dec6487303222ffb737e255b9f4591e793bf8b9