Return new copy of interfaces on each Interfaces() call

src/multicast/multicast_darwin.go

@@ -38,8 +38,8 @@ func (m *Multicast) multicastStarted() {
 	awdlGoroutineStarted = true
 	for {
 		C.StopAWDLBrowsing()
-		for _, intf := range m.GetInterfaces() {
-			if intf.Name == "awdl0" {
+		for intf := range m.Interfaces() {
+			if intf == "awdl0" {
 				m.log.Infoln("Multicast discovery is using AWDL discovery")
 				C.StartAWDLBrowsing()
 				break