tdf#98599 SVG: consider attributes of 'defs' element

The element 'defs' is not rendered, but children of it may
inherit the attributes. Therefore these has to be considered.

Change-Id: Ic6c21645439731db63f22adf5a5a4e2af2b74b71
Reviewed-on: https://gerrit.libreoffice.org/23309Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: jan iversen <jani@documentfoundation.org>

svgio/source/svgreader/svggnode.cxx

@@ -45,8 +45,8 @@ namespace svgio
         {
             if (SVGTokenDefs == getType())
             {
-                // #i125258# call parent for SVGTokenDefs
-                return SvgNode::getSvgStyleAttributes();
+                // tdf#98599 attributes may be inherit by the children, therefore read them
+                return checkForCssStyle("defs", maSvgStyleAttributes);
             }
             else
             {