monitor: shut up gcc.
monitor: shut up gcc.

Closes #2885.

Signed-off-by: tomponline <311bb6b467675b937a24a1860d8fd7780626c535@tomp.uk>

hallyn/lxc,ss1h2a3tw/lxc,hallyn/lxc,ss1h2a3tw/lxc,ss1h2a3tw/lxc,hallyn/lxc