Fix some inefassign warnings

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

contrib/docker-device-tool/device_tool.go

@@ -38,7 +38,7 @@ func byteSizeFromString(arg string) (int64, error) {
 
 	rest = strings.ToLower(strings.TrimSpace(rest))
 
-	var multiplier int64 = 1
+	var multiplier int64
 	switch rest {
 	case "":
 		multiplier = 1

daemon/cluster/executor/container/controller.go

@@ -637,7 +637,7 @@ func parsePortMap(portMap nat.PortMap) ([]*api.PortConfig, error) {
 			return nil, err
 		}
 
-		protocol := api.ProtocolTCP
+		var protocol api.PortConfig_Protocol
 		switch strings.ToLower(parts[1]) {
 		case "tcp":
 			protocol = api.ProtocolTCP