Fix for Heap-use-after-free in webrtc::voe::Channel::SendRTCPPacket

Ensures that we always call DeRegisterExternalTransport() even if a fuzz test calls DeRegisterExternalTransport in an unintialized state.

TBR=tommi
BUG=296804 in crbug.com

Review URL: https://webrtc-codereview.appspot.com/2275008

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@4827 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed