strategy: avoid returning nil dialer in lha.nextDialer

README.md

@@ -215,9 +215,9 @@ Available forward strategies:
   ha: High Availability mode
   lha: Latency based High Availability mode
 
-Forwarder option scheme: FORWARD_URL[#OPTIONS]
-  Available options for forwarders:
+Forwarder option scheme: FORWARD_URL#OPTIONS
   priority: set the priority of that forwarder, default:0
+  -
   Examples:
     socks5://1.1.1.1:1080#priority=100
     vmess://[security:]uuid@host:port?alterID=num#priority=200

conf.go

@@ -193,7 +193,8 @@ func usage() {
 
 	fmt.Fprintf(os.Stderr, "Forwarder option scheme: FORWARD_URL#OPTIONS\n")
 	fmt.Fprintf(os.Stderr, "  priority: set the priority of that forwarder, default:0\n")
-	fmt.Fprintf(os.Stderr, "  e.g.:\n")
+	fmt.Fprintf(os.Stderr, "  -\n")
+	fmt.Fprintf(os.Stderr, "  Examples:\n")
 	fmt.Fprintf(os.Stderr, "    socks5://1.1.1.1:1080#priority=100\n")
 	fmt.Fprintf(os.Stderr, "    vmess://[security:]uuid@host:port?alterID=num#priority=200\n")
 	fmt.Fprintf(os.Stderr, "\n")

strategy/strategy.go

@@ -248,24 +248,23 @@ func newLHADialer(dialers []*proxy.Forwarder, webhost string, duration int) prox
 
 func (lha *lhaDialer) nextDialer(dstAddr string) *proxy.Forwarder {
 	var latency int64
-	var d *proxy.Forwarder
-	for _, fwder := range lha.fwdrs {
+	for i, fwder := range lha.fwdrs {
 		if fwder.Enabled() {
 			lha.priority = fwder.Priority
 			latency = fwder.Latency()
-			d = fwder
+			lha.idx = i
 			break
 		}
 	}
 
-	for _, fwder := range lha.fwdrs {
+	for i, fwder := range lha.fwdrs {
 		if fwder.Enabled() && fwder.Priority >= lha.priority && fwder.Latency() < latency {
 			latency = fwder.Latency()
-			d = fwder
+			lha.idx = i
 		}
 	}
 
-	return d
+	return lha.fwdrs[lha.idx]
 }
 
 func (lha *lhaDialer) Dial(network, addr string) (net.Conn, error) {