fdo#66582 avoid crash because of missing model

The SdrObject is still under construction at this point, so it does not
make sense to broadcast changes, because there are not any listeners
anyway.

Change-Id: Ib05e30843b4b0e125d5cae18a481e16fb7e21ba1

reportdesign/source/core/sdr/RptObject.cxx

@@ -150,7 +150,7 @@ SdrObject* OObjectBase::createObject(const uno::Reference< report::XReportCompon
             {
                 sal_Bool bOpaque = sal_False;
                 _xComponent->getPropertyValue(PROPERTY_OPAQUE) >>= bOpaque;
-                pNewObj->SetLayer(bOpaque ? RPT_LAYER_FRONT : RPT_LAYER_BACK);
+                pNewObj->NbcSetLayer(bOpaque ? RPT_LAYER_FRONT : RPT_LAYER_BACK);
             }
             catch(const uno::Exception&)
             {