Fix saving of polygons' transforms

src/adaptors/UBSvgSubsetAdaptor.cpp

@@ -1534,7 +1534,7 @@ void UBSvgSubsetAdaptor::UBSvgSubsetWriter::polygonItemToSvgPolygon(UBGraphicsPo
 
         QString points = pointsToSvgPointsAttribute(polygon);
         mXmlWriter.writeAttribute("points", points);
-        mXmlWriter.writeAttribute("transform",toSvgTransform(polygonItem->sceneMatrix()));
+        mXmlWriter.writeAttribute("transform",toSvgTransform(polygonItem->matrix()));
         mXmlWriter.writeAttribute("fill", polygonItem->brush().color().name());
 
         qreal alpha = polygonItem->brush().color().alphaF();