Fix to issue #28 and also added a default case to tab list.

src/main/java/net/md_5/bungee/BungeeCord.java

@@ -165,7 +165,7 @@ public class BungeeCord
 
         switch (config.tabList)
         {
-            case 1:
+            default: case 1:
                 tabListHandler = new GlobalPingTabList();
                 break;
             case 2:

src/main/java/net/md_5/bungee/tablist/ServerUnqiueTabList.java

@@ -24,18 +24,18 @@ public class ServerUnqiueTabList implements TabListHandler
     public void onServerChange(UserConnection con)
     {
         Set<String> usernames = sentUsernames.get(con);
-        synchronized (usernames)
-        {
         if (usernames != null)
+        {
+	        synchronized (usernames)
 	        {
 	            for (String username : usernames)
 	            {
 	                con.packetQueue.add(new PacketC9PlayerListItem(username, false, 9999));
 	            }
-            }
 	            usernames.clear();
 	        }
         }
+    }
 
     @Override
     public void onPingChange(UserConnection con, int ping)