fix 2 bugs: gen_statistics called multiple times, dist_cards accepts values too large

cards.py

@@ -53,7 +53,8 @@ def getperm(update, context):
     else:
         tuser = from_user
     tplayer = get_player(int(tuser.id))
-    update.message.reply_text(f"{display_username(tuser)} 等级为 {tplayer.permission}",
+    update.message.reply_text((f"{display_username(tuser)} 等级为 {tplayer.permission}\n"
+                               f"口袋里有 {tplayer.immunity_cards} 张免疫卡"),
                               parse_mode="Markdown")
 
 @run_async
@@ -235,6 +236,7 @@ def dist_cards(update, context):
             (cards, damount) = [int(a) for a in context.args]
             assert (cards > 0 and damount > 0)
             fplayer = get_player(int(from_user.id))
+            assert fplayer.immunity_cards >= cards
             fplayer.immunity_cards -= cards
             fplayer.save()
             red_packets = context.chat_data.setdefault('red_packets', dict())

mscore.py

@@ -152,7 +152,7 @@ class Board():
         self.__open(row, col)
 
     def gen_statistics(self):
-        if self.__op != 0:
+        if self.__3bv != 0:
             return (self.__op, self.__is, self.__3bv)
         self.__visited = np.zeros((self.height, self.width), dtype=np.int8)
         def scan_open(row, col):