路由：修复单个路由情况

web-server/app/controller/game.ts

@@ -160,13 +160,14 @@ export default class GameController extends Controller {
         // select connector
         let sum = connectors.reduce((pre, cur) => pre + (cur['num']||0), 0);
         let res;
-        if(sum == 0) {
-            res = dispatch(userCode, connectors, 'connector');
-        } else {
+        if(sum > 0) {
             let serversWithWeight = connectors.map(cur => ({...cur, weight: sum - (cur['num']||0)}));
             let randResult = getRandEelmWithWeight(serversWithWeight);
             res = randResult.dic;
         }
+        if(!res) {
+            res = dispatch(userCode, connectors, 'connector');
+        }
         let { id, serverType, clientHost, clientPort, num = 0 } = res;
 
         await redisClient.hsetAsync(REDIS_KEY.SYS_SERVER, id, JSON.stringify({ serverType, clientHost, clientPort, id, num: num + 1 }));