Philipp Hancke c0ed83eac2 Bail out early if the RTP send module for a SSRC was not found
since it might have been deregistered previously.

BUG=chromium:1454860,chromium:1459124

Change-Id: I70ba43265361d040e568f83b6400ff8f3c2a8e98
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/311800
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Philipp Hancke <phancke@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#40431}
2023-07-14 10:45:36 +00:00
..
2022-09-30 08:44:30 +00:00