[1.12.2]用MrCrayFish's gun mod里的枪打怪会使服务器崩溃(Server crash when damaging entities with guns in MrCrayFish's gun mod)

[Abandon-W]

（详细错误日志在最下面）
环境：
MC版本1.12.2，使用Forge ModLoader
GokiStats 1.12.2-1.2.10（https://www.curseforge.com/minecraft/mc-mods/gokistats/files/all?page=1&pageSize=20&version=1.12.2）
Gun Mod 0.15.3（https://www.curseforge.com/minecraft/mc-mods/mrcrayfishs-gun-mod/files/all?page=1&pageSize=20&version=1.12.2）
此外，维克的现代战争里的枪也会导致同样的报错。大概是因为实体受伤时会判断该造成伤害的物品是否被支持（应该是判断能不能吃到技能加成），结果有空指针？
如果要确认更多信息，可以加我qq2373287929。劳烦更改，不胜感激！

|[00:22:32] [提示] [服务器]: [___L1X: Given [Shotgun] * 1 to __L1X]
| at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
| at java.lang.Thread.run(Thread.java:748) [?:1.8.0_312]
|Caused by: java.lang.NullPointerException
| at net.infstudio.goki.common.stat.tool.ToolSpecificStat.isItemSupported(ToolSpecificStat.java:88) ~[ToolSpecificStat.class:?]
| at net.infstudio.goki.common.handlers.CommonHandler.entityHurt(CommonHandler.java:268) ~[CommonHandler.class:?]
| at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_611_CommonHandler_entityHurt_LivingHurtEvent.invoke(.dynamic) ~[?:?]
| at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) ~[ASMEventHandler.class:?]
| at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182) ~[EventBus.class:?]
| at net.minecraftforge.common.ForgeHooks.onLivingHurt(ForgeHooks.java:604) ~[ForgeHooks.class:14.23.5.2860]
| at net.minecraft.entity.EntityLivingBase.func_70665_d(EntityLivingBase.java:1410) ~[vp.class:?]
| at net.minecraft.entity.EntityLivingBase.func_70097_a(EntityLivingBase.java:926) ~[vp.class:?]
| at net.minecraft.entity.monster.EntityMob.func_70097_a(EntityMob.java:70) ~[ade.class:?]
| at net.minecraft.entity.monster.EntityZombie.func_70097_a(EntityZombie.java:233) ~[adt.class:?]
| at com.mrcrayfish.guns.entity.EntityProjectile.onHitEntity(EntityProjectile.java:299) ~[EntityProjectile.class:?]
| at com.mrcrayfish.guns.entity.EntityProjectile.onHit(EntityProjectile.java:277) ~[EntityProjectile.class:?]
| at com.mrcrayfish.guns.entity.EntityProjectile.func_70071_h(EntityProjectile.java:166) ~[EntityProjectile.class:?]
| at net.minecraft.world.World.func_72866_a(World.java:1996) ~[amu.class:?]
| at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:832) ~[oo.class:?]
| at net.minecraft.world.World.func_72870_g(World.java:1958) ~[amu.class:?]
| at net.minecraft.world.World.func_72939_s(World.java:1762) ~[amu.class:?]
| at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:613) ~[oo.class:?]
| at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:767) ~[MinecraftServer.class:?]
| ... 4 more