修正一个由于修改数据结构导致的多人模式报错的bug

src/services/GameLogic.ts

@@ -80,7 +80,7 @@ export async function startGame(roomId: string, sessionId: string) {
 export async function sendOneQuestion(history: any) {
   const roomId = history.room
   new Schedule().stopSchedule(history.scheduleKey)
-  if (history.current >= history.questions.length) {
+  if (history.current >= history.questions.size) {
     console.log('match over')
     history.status = 9
     await history.save()