[PATCH 4/7] Fix divecomputer part of UDDF export

[Long, Martin]

So, the info in every profile (for my Suunto) is:

  <divecomputer model='Suunto Vyper Air' deviceid='cef51609' diveid='8ab03c43'>

And the details in the <settings> section, when I add a nickname:

<divecomputerid model='Suunto Vyper Air' deviceid='cef51609' nickname='nick'/>

So, it looks like there are no version details, or fimware. I suppose
if there is more data then it might create this section anyway.

Also, if the section isn't there, then log -> edit device list must
read the devices from the profiles, as it shows my Suunto in there,
along with the device ID.

M