[Libreoffice] [PUSHED] fix for fdo#34768 - no update preview

[Péter Rabi]

Hi Noel, all,

> pushed to 3.4 ( will commit to master once I have a build later )
> I think I have seen you have previously state your patches are under 
> LGPLv3+/MPL1.1, if not can you confirm ?

Yes, I affirm I'm contributing my patches under license LGPLv3+/MPL1.1.
The above is in accordance with my earlier patches, too. (I used to
denote this piece of information in the commit message.)

Best regards,
  Péter