修复portball条件缺失所导致的报错

list.json

@@ -152,13 +152,13 @@
         },
         {
             "name": "portball",
-            "version": "1.21",
+            "version": "1.22",
             "section": "chat",
             "maintainer": "Pentacene",
             "size": "3.6 kb",
             "supported": true,
             "des-short": "回复你要临时禁言的人的消息来实现XX秒的禁言。",
-            "des": "这个人很懒，什么都没有留下。"
+            "des": "portball 原因 秒数"
         },
         {
             "name": "resou",

portball.py

@@ -18,6 +18,15 @@ async def portball(context):
                 last_name = ''
             else:
                 last_name = reply.sender.last_name
+            if len(action) < 2:
+                notification = await bot.send_message(context.chat_id, '格式是\n-portball 理由 秒数\n真蠢', reply_to = context.id)
+                await sleep(10)
+                await notification.delete()
+                try:
+                    await context.delete()
+                except:
+                    pass
+                return False
             if int(action[1])<60:
                 notification = await bot.send_message(context.chat_id, '诶呀不要小于60秒啦', reply_to = context.id)
                 await sleep(10)