Fixed an issue with incorrect handling of a nil result in SystemEvaluate and SystemEvaluateOn nodes.
Fixed an issue with incorrect handling of a nil result in SystemEvaluate and SystemEvaluateOn nodes.

n8allan/Dataphor,n8allan/Dataphor,DBCG/Dataphor,DBCG/Dataphor,DBCG/Dataphor,n8allan/Dataphor,n8allan/Dataphor,DBCG/Dataphor,n8allan/Dataphor,DBCG/Dataphor,n8allan/Dataphor,DBCG/Dataphor