计算ap的时候, 判断player是否为空

src/utils/game.util.ts

@@ -248,6 +248,9 @@ let gameUtil = {
      */
     calcTotalAp(player: Player) {
         let result = 0;
+        if (!player) {
+            return result;
+        }
         for (let [pid, pet] of player.pets) {
             result += pet.ap;
         }