rtx packet may have addition extension (mid) and may use different
header size for extension (e.g. if repaired rtp stream id registered
to larger id than rtp stream id)
As a result rtx packet size calculation as orginial size + 2 bytes in
some scenarious may be incorrect. This chenage avoids crash in that cases.
Bug: None
Change-Id: I620d95e0592d6bdac0d3623b2675a49fc2177580
Reviewed-on: https://webrtc-review.googlesource.com/c/122180
Reviewed-by: Erik Varga <erikvarga@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26635}
271195f336