The EmfPlusBoundaryPointData object specifies a closed cardinal spline boundary for a gradient brush.
This data is starting point for displaying correctly gradients.
Change-Id: I91b01417c6dc00a04dabfc5a035afe9085999240
Reviewed-on: https://gerrit.libreoffice.org/37519
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Bartosz Kosiorek <gang65@poczta.onet.pl>