fix-bug nullreference

zhangyuekai

2024-08-10 a18b907beff8b21fb4c9d6fb72678ac5e9f7b80d

 HStation.RevitDev/RevitDataExport/Utility/ConnectorExtense.cs

@@ -13,6 +13,8 @@
            var refs = connector.AllRefs;

            foreach (Connector reference in refs)

            {

                if (reference.Owner.Id == connector.Owner.Id) { continue; }



                var owner = reference.Owner;

                if (owner is PipingSystem ps)

                {