rtcpfilter: Verify if the packet exists before continuing
rtcpfilter: Verify if the packet exists before continuing

pexip/farstream,shadeslayer/farstream,kakaroto/farstream,tieto/farstream,shadeslayer/farstream,kakaroto/farstream,ahmedammar/skype_farsight2,ahmedammar/skype_farsight2,kakaroto/farstream,ahmedammar/skype_farsight2,ahmedammar/skype_farsight2,pexip/farstream,tieto/farstream,tieto/farstream,tieto/farstream,tieto/farstream,kakaroto/farstream,pexip/farstream,shadeslayer/farstream,pexip/farstream,shadeslayer/farstream