fix a patch catboy asked me to

Spigot-Server-Patches/0093-Add-PlayerUseUnknownEntityEvent.patch

@@ -1,4 +1,4 @@
-From f2aa3681729af76cbf7d48b050d2b022dc103701 Mon Sep 17 00:00:00 2001
+From 6d4327193f6dc1773ded2f0ecdb48e141f864542 Mon Sep 17 00:00:00 2001
 From: Jedediah Smith <jedediah@silencegreys.com>
 Date: Sat, 2 Apr 2016 05:09:16 -0400
 Subject: [PATCH] Add PlayerUseUnknownEntityEvent
@@ -18,7 +18,7 @@ index 77440ac81..8711462e1 100644
      private Vec3D c;
      private EnumHand d;
 diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
-index 2cc277e4f..553011d88 100644
+index 2cc277e4f..b1f483990 100644
 --- a/src/main/java/net/minecraft/server/PlayerConnection.java
 +++ b/src/main/java/net/minecraft/server/PlayerConnection.java
 @@ -1888,6 +1888,16 @@ public class PlayerConnection implements PacketListenerPlayIn, ITickable {
@@ -30,8 +30,8 @@ index 2cc277e4f..553011d88 100644
 +            this.server.getPluginManager().callEvent(new com.destroystokyo.paper.event.player.PlayerUseUnknownEntityEvent(
 +                this.getPlayer(),
 +                packetplayinuseentity.getEntityId(),
-+                packetplayinuseentity.a() == PacketPlayInUseEntity.EnumEntityUseAction.ATTACK,
-+                packetplayinuseentity.b() == EnumHand.MAIN_HAND ? EquipmentSlot.HAND : EquipmentSlot.OFF_HAND
++                packetplayinuseentity.b() == PacketPlayInUseEntity.EnumEntityUseAction.ATTACK,
++                packetplayinuseentity.c() == EnumHand.MAIN_HAND ? EquipmentSlot.HAND : EquipmentSlot.OFF_HAND
 +            ));
 +        }
 +        // Paper end
@@ -40,4 +40,3 @@ index 2cc277e4f..553011d88 100644
 
 --
 2.18.0
-