Bugfix: don't add non-existing devices to the device manager.
Bugfix: don't add non-existing devices to the device manager.

neXyon/audaspace,neXyon/audaspace,DethonUSAL/audaspace,audaspace/audaspace,DethonUSAL/audaspace,audaspace/audaspace,audaspace/audaspace,neXyon/audaspace,DethonUSAL/audaspace