commit 9b4aa600e5cf1cf993c7a44471353aa977deccc7
author Henrik Lundin <henrik.lundin@webrtc.org> Fri Apr 20 07:07:45 2018
committer Commit Bot <commit-bot@chromium.org> Fri Apr 20 09:29:10 2018
tree 35f179f25f59204ef1bc76f675b7b7fb2c2ae9e2
parent e2ae78b381d5a4efe6f8bf424d7192f78feb8a7a

Fix ptr overflow warning in filter_ar.c

In this code, the problem was that the ptr could sometimes point
outside of the allocated arrays, in particular before the array,
causing a pointer overflow warning. However, the memory pointed to was
never read or written while the pointer was off.

With this change, we keep an index instead of a pointer, which avoids
warnings for pointer overflow. The index might be negative at times,
but the index will not be used to address the arrays while negative.

Bug: webrtc:9166
Change-Id: I3a32d8e814660f43be9d4c94889d00ac3f8403a5
Reviewed-on: https://webrtc-review.googlesource.com/71165
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Commit-Queue: Henrik Lundin <henrik.lundin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22951}