with out the class-define
  gcc -> "error: a class-key must be used when declaring a friend"

Change-Id: I6384d9b37a9105db2af9e6c65cd02a56c4169abe
Reviewed-on: https://gerrit.libreoffice.org/15568Reviewed-by: Michael Meeks <michael.meeks@collabora.com>
Tested-by: Michael Meeks <michael.meeks@collabora.com>