tbtadm topology output looks odd if controller does not have device/vendor name

[westeri]

My desktop PC with Falcon Ridge does not have device and vendor name information in DROM so the two files are empty. Running tbtadm topology shows:

% tbtadm topology
Controller 0
    +- Details:
    |   +- Name: , 
    |   +- Security level: SL1 (user)

I think it would be better to show something like "N/A" or so instead of just ",".