That call in the RTFSprms copy ctor to the parent non-copy ctor was a
bit odd.

Change-Id: Ic219ec22c0b63472766a668406585dbbeebae2f7
Reviewed-on: https://gerrit.libreoffice.org/57763Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins