Correcting the check for the return code produced by
AudioProcessing::ProcessReverseStream().
Before the change, only -1 was considered to be an error.

Allthough the error code scheme for AudioProcessing definitely
could be discussed, the current scheme have many error codes that
differ from -1 and thus were not caught by the old code.

BUG=webrtc:5237

Review URL: https://codereview.webrtc.org/1515073004

Cr-Original-Commit-Position: refs/heads/master@{#11003}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: e5ae6f82374cb064d39cffffdb650840f734880f
1 file changed