forked from amazingfate/loongoffice
All DrawingLayer Atrributes used for ptimitives need a default constructor. Since the o3tl::cow_wrapper is used in combination with a static default incarnation of the impl class it is better to define that. Also needed is a working isDefault() implementation that compares the impl class to the static default. Added missing stuff for this. Change-Id: I98e9fee7343112cd979b972229423ac0ef3994a6 Reviewed-on: https://gerrit.libreoffice.org/24496 Tested-by: Jenkins <ci@libreoffice.org> Reviewed-by: Armin Le Grand <Armin.Le.Grand@cib.de>