GitLab

The qmp_log function blocks if no argument is sent. For instance,
qmp_log $(qmp_get_wifi_devices) would block if qmp_get_wifi_devices
would return empty.

Putting it into quotes does the trick: qmp_log "$(qmp_get_wifi_devices)"

Fixes #492
Signed-off-by: Roger Pueyo Centelles <roger.pueyo@guifi.net>