Amend replace_order_by_distance.go

Author: nicktobey

sql/analyzer/replace_order_by_distance.go

@@ -118,7 +118,7 @@ func replaceIdxOrderByDistanceHelper(ctx *sql.Context, scope *plan.Scope, node s
 		var err error
 		same := transform.SameTree
 		switch c := child.(type) {
-		case *plan.Project, *plan.TableAlias, *plan.ResolvedTable, *plan.Filter, *plan.Limit, *plan.Offset, *plan.Sort, *plan.IndexedTableAccess:
+		case *plan.Project, *plan.TableAlias, *plan.ResolvedTable, *plan.Filter, *plan.Limit, *plan.TopN, *plan.Offset, *plan.Sort, *plan.IndexedTableAccess:
 			newChildren[i], same, err = replaceIdxOrderByDistanceHelper(ctx, scope, child, sortNode)
 		default:
 			newChildren[i] = c