fix bug

app/views/myshixuns/challenges.json.jbuilder

@@ -6,6 +6,6 @@ json.array! @games do |game|
   json.identifier get_game_identifier(@shixun.task_pass, game, @identity)
   json.get_gold game.user_get_gold_and_experience(@shixun.status, challenge)[0]
   json.get_experience game.user_get_gold_and_experience(@shixun.status, challenge)[1]
-  json.view_answer_time  view_answer_time(game, user_id)
+  json.view_answer_time  view_answer_time(game, current_user.id)
   json.finished_time game.end_time
 end