Use increment operator

Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com>
Upstream-commit: 16e850fe3ea42f5103c9a11f3db17d11dc4f6ada
Component: engine

components/engine/daemon/graphdriver/devmapper/deviceset.go

@@ -832,7 +832,7 @@ func (devices *DeviceSet) waitRemove(devname string) error {
 	log.Debugf("[deviceset %s] waitRemove(%s)", devices.devicePrefix, devname)
 	defer log.Debugf("[deviceset %s] waitRemove(%s) END", devices.devicePrefix, devname)
 	i := 0
-	for ; i < 1000; i += 1 {
+	for ; i < 1000; i++ {
 		devinfo, err := getInfo(devname)
 		if err != nil {
 			// If there is an error we assume the device doesn't exist.
@@ -861,7 +861,7 @@ func (devices *DeviceSet) waitRemove(devname string) error {
 // or b) the 10 second timeout expires.
 func (devices *DeviceSet) waitClose(info *DevInfo) error {
 	i := 0
-	for ; i < 1000; i += 1 {
+	for ; i < 1000; i++ {
 		devinfo, err := getInfo(info.Name())
 		if err != nil {
 			return err