The pitch gain type in ComputePitchGainThreshold() is wrong (size_t instead of float). The pitch period is an unsigned integer type, but it is safer to switch to a signed type and add checks on the sign. Bug: webrtc:9076 Change-Id: If69d182071edab9750a320f0fbfac24aa8052ee0 Reviewed-on: https://webrtc-review.googlesource.com/c/117302 Reviewed-by: Alex Loiko <aleloi@webrtc.org> Commit-Queue: Alessio Bazzica <alessiob@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26259}