session: fix fifos display
session: fix fifos display

This prevents a crash with quic listeners, and enables the display
of udp fifo status.

Change-Id: Ib9f48818ee3e51a3fa43ad8ab175e8aa7750df8f
Type: fix
Signed-off-by: Aloys Augustin <d6b8501f412613ec57d5e3c9c2f9fadce4147f25@cisco.com>

FDio/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp