修复玩家game节点分配

nodes/gate/service/srvSprotoAgent.lua

@@ -95,6 +95,9 @@ function CMD.login(uid, fd)
         -- 分配游戏服节点/agent
         local gameNode, gameAgent = nodeUtil:user_dispatch_game_node_and_agent(uid)
         log.info("login uid[%s] gameNode[%s] gameAgent[%s]", tostring(uid), tostring(gameNode), tostring(gameAgent))
+        if is_empty(gameNode) or is_empty(gameAgent) then
+            return false
+        end
 
         session = {
             fd = fd,