修复敌人发射子弹会报错的问题

ActionTowerDefense/Assets/Scripts/Characters/AttackController.cs

@@ -486,7 +486,7 @@ public class AttackController : MonoBehaviour
             bullet.canTransmit = true;
         }
         Demonic demonic = owner as Demonic;
-        if (demonic.canSizeChange)
+        if (demonic && demonic.canSizeChange)
         {
             float rate = demonic.bigSoldier.nowSize;
             bullet.transform.localScale = new Vector3(bullet.originalScale.x * rate, bullet.originalScale.y * rate, 1);