fix leak in mnl_socket_open()
fix leak in mnl_socket_open()

cyclops8456/libmnl,cyclops8456/libmnl,threatstack/libmnl,fqrouter/libmnl,vyos/libmnl,remfalc/vyt-libmnl,greearb/libmnl-ct,vyos/libmnl,Distrotech/libmnl,remfalc/vyt-libmnl,vyatta/libmnl,Distrotech/libmnl,vyos/libmnl,greearb/libmnl-ct,threatstack/libmnl,cyclops8456/libmnl,fqrouter/libmnl,vyatta/libmnl,chamaken/libmnl,chamaken/libmnl