Correctly handle reading from events channel

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

cmd/ctr/commands/events/events.go

@@ -42,18 +42,15 @@ var Command = cli.Command{
 		defer cancel()
 		eventsClient := client.EventService()
 		eventsCh, errCh := eventsClient.Subscribe(ctx, context.Args()...)
-		for {
+		open := true
+		for open {
 			var e *events.Envelope
 			select {
-			case evt, closed := <-eventsCh:
-				if closed {
-					return nil
-				}
-				e = evt
-			case err := <-errCh:
+			case e = <-eventsCh:
+			case err, open = <-errCh:
 				return err
 			}
-
+			if e != nil {
 				var out []byte
 				if e.Event != nil {
 					v, err := typeurl.UnmarshalAny(e.Event)
@@ -65,7 +62,6 @@ var Command = cli.Command{
 						return err
 					}
 				}
-
 				if _, err := fmt.Println(
 					e.Timestamp,
 					e.Namespace,
@@ -75,5 +71,7 @@ var Command = cli.Command{
 					return err
 				}
 			}
+		}
+		return nil
 	},
 }