Houston, we got a patch (#2731)

* Houston, we got a patch

* is this the end of the beginning or the beginning of the end

Spigot-Server-Patches/Fire-BlockPistonRetractEvent-for-all-empty-pistons.patch

@@ -24,7 +24,7 @@ Instead we opt to remove the check entirely so that the event fires for
 all piston types.
 
 diff --git a/src/main/java/net/minecraft/server/BlockPiston.java b/src/main/java/net/minecraft/server/BlockPiston.java
-index e883c7ac98..de804348f3 100644
+index 1170a2810..b29525c40 100644
 --- a/src/main/java/net/minecraft/server/BlockPiston.java
 +++ b/src/main/java/net/minecraft/server/BlockPiston.java
 @@ -0,0 +0,0 @@ public class BlockPiston extends BlockDirectional {
@@ -44,5 +44,5 @@ index e883c7ac98..de804348f3 100644
 +            //} // Paper
              // PAIL: checkME - what happened to setTypeAndData?
              // CraftBukkit end
-             world.playBlockAction(blockposition, this, b0, enumdirection.a());
+             world.playBlockAction(blockposition, this, b0, enumdirection.b());
 --