libvpx: Pull from upstream

source/libvpx/vpx_mem/memory_manager/hmm_true.c

-/*
- *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-
-/* This code is in the public domain.
-** Version: 1.1  Author: Walt Karas
-*/
-
-#include "hmm_intrnl.h"
-
-U(size_aau) U(true_size)(void *payload_ptr) {
-  register  head_record *head_ptr = PTR_REC_TO_HEAD(payload_ptr);
-
-#ifdef HMM_AUDIT_FAIL
-  AUDIT_BLOCK(head_ptr)
-#endif
-
-  /* Convert block size from BAUs to AAUs.  Subtract head size, leaving
-  ** payload size.
-  */
-  return(
-          (BLOCK_BAUS(head_ptr) * ((U(size_aau)) HMM_BLOCK_ALIGN_UNIT)) -
-          HEAD_AAUS);
-}