fix server index problem

shadowsocks-csharp/Controller/ShadowsocksController.cs

@@ -109,6 +109,10 @@ namespace Shadowsocks.Controller
             {
                 return strategy.GetAServer(type, localIPEndPoint);
             }
+            if (_config.index < 0)
+            {
+                _config.index = 0;
+            }
             return GetCurrentServer();
         }
 
@@ -293,7 +297,8 @@ namespace Shadowsocks.Controller
             polipoRunner.Stop();
             try
             {
-                foreach (var strategy in GetStrategies())
+                var strategy = GetCurrentStrategy();
+                if (strategy != null)
                 {
                     strategy.ReloadServers();
                 }

shadowsocks-csharp/Model/Configuration.cs

@@ -55,6 +55,13 @@ namespace Shadowsocks.Model
                 {
                     config.localPort = 1080;
                 }
+                if (config.index == -1)
+                {
+                    if (config.strategy == null)
+                    {
+                        config.index = 0;
+                    }
+                }
                 return config;
             }
             catch (Exception e)
@@ -86,6 +93,13 @@ namespace Shadowsocks.Model
             {
                 config.index = -1;
             }
+            if (config.index == -1)
+            {
+                if (config.strategy == null)
+                {
+                    config.index = 0;
+                }
+            }
             config.isDefault = false;
             try
             {