Validate tripwire hook placement before update

Spigot-Server-Patches/0446-Validate-tripwire-hook-placement-before-update.patch

@@ -0,0 +1,21 @@
+From c1584ce207e7ae55546647f5a4436c475f95c42a Mon Sep 17 00:00:00 2001
+From: Shane Freeder <theboyetronic@gmail.com>
+Date: Sat, 7 Mar 2020 00:07:51 +0000
+Subject: [PATCH] Validate tripwire hook placement before update
+
+
+diff --git a/src/main/java/net/minecraft/server/BlockTripwireHook.java b/src/main/java/net/minecraft/server/BlockTripwireHook.java
+index 1b9d889af..a5e6e94fe 100644
+--- a/src/main/java/net/minecraft/server/BlockTripwireHook.java
++++ b/src/main/java/net/minecraft/server/BlockTripwireHook.java
+@@ -149,6 +149,7 @@ public class BlockTripwireHook extends Block {
+ 
+         this.a(world, blockposition, flag4, flag5, flag2, flag3);
+         if (!flag) {
++            if (world.getType(blockposition).getBlock() == Blocks.TRIPWIRE_HOOK) // Paper - validate
+             world.setTypeAndData(blockposition, (IBlockData) iblockdata3.set(BlockTripwireHook.FACING, enumdirection), 3);
+             if (flag1) {
+                 this.a(world, blockposition, enumdirection);
+-- 
+2.25.0
+