Filter out lineout from accessory detection.
Filter out lineout from accessory detection.

We do not have a lineout device in the ruleset and we cannot route there.
As this is represented by a NULL device name in the device list trying
to route there results in a crash.

jusa/ohm-plugins-misc,jusa/ohm-plugins-misc,maemo-foss/maemo-multimedia-ohm-plugins-misc,tswindell/ohm-plugins-misc,tswindell/ohm-plugins-misc,maemo-foss/maemo-multimedia-ohm-plugins-misc,maemo-foss/maemo-multimedia-ohm-plugins-misc,jusa/ohm-plugins-misc,jusa/ohm-plugins-misc,tswindell/ohm-plugins-misc