FontName -> FontFamily error

Introduced in c67d6b2a57f6e95395515fe695709590af109397
Thanks to Matteo Casalin.

Change-Id: Ibaa7956eb44cfe62bbaf73ff5656dc21a5793c6a
Reviewed-on: https://gerrit.libreoffice.org/10612
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
Tested-by: Tomaž Vajngerl <quikee@gmail.com>