DOCX custom geometry shape's path width and height are now used
independently for scaling calculations.

Change-Id: I368dd4dc065b8f122c4eb2911261e45047f03c70
Reviewed-on: https://gerrit.libreoffice.org/37639Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>