Fix unchecked return value for fcntl. Coverity issue: 277210 Fixes: bd8f50a45d0f ("net/virtio-user: support server mode") Cc: stable at dpdk.org Signed-off-by: Chenbo Xia <chenbo.xia at intel.com> --- Acked-by: Rami Rosen <ramirose at gmail.com>