net/virtio-user: fix uninitialized reply-ack variable
net/virtio-user: fix uninitialized reply-ack variable

This patch fixes an issue that uninitialized has_reply_ack
is used for setting message flags.

Coverity issue: 360834
Fixes: c60208dd6384 ("net/virtio-user: support reply-ack")

Signed-off-by: Chenbo Xia <5d298a4585cd22ca5d29de25967a5599c4c324c8@intel.com>
Acked-by: Adrian Moreno <4e5c605993413892a1c21f38afc464bef7695397@redhat.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk