This fixes an issue with a shape defined with these attributes:
mso-width-percent:0;mso-height-percent:0 and
mso-width-relative:page;mso-height-relative:page;
where all points were then located in (0,0)

Change-Id: I51070ad2b2e4e05ab64f16813472ca1d7099fb09
Reviewed-on: https://gerrit.libreoffice.org/775Reviewed-by: Petr Mladek <pmladek@suse.cz>
Tested-by: Petr Mladek <pmladek@suse.cz>