Update clients when setting blocks to air

Spigot-Server-Patches/0165-Update-clients-when-setting-blocks-to-air.patch

@@ -0,0 +1,31 @@
+From 290cbb38a943a5bb021e5aace7bf3c0cd97f1410 Mon Sep 17 00:00:00 2001
+From: Zach Brown <zach.brown@destroystokyo.com>
+Date: Sat, 25 Jun 2016 21:04:05 -0500
+Subject: [PATCH] Update clients when setting blocks to air
+
+In fixing SPIGOT-611, the server sets an area to air and doesn't update the clients.
+Usually this is fine, most of the time we'll just be setting the intended block shortly after anyway.
+
+Except if we're setting air. In which case the server will not send the change because it already sees the block as set.
+We workaround this by telling the server to send the client the block change if it is of ID 0 (Air). I assume this
+patch will not last long enough to warrant moving away from the ID.
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
+index a5d6f1d..60a1692 100644
+--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
++++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
+@@ -137,7 +137,10 @@ public class CraftBlock implements Block {
+         BlockPosition position = new BlockPosition(x, y, z);
+ 
+         // SPIGOT-611: need to do this to prevent glitchiness. Easier to handle this here (like /setblock) than to fix weirdness in tile entity cleanup
+-        chunk.getHandle().getWorld().setTypeAndData(position, Blocks.AIR.getBlockData(), 0);
++        // Paper start - If we're setting air, we need to explicitly tell it to send to clients
++        int flag = (type == 0) ? 2 : 0;
++        chunk.getHandle().getWorld().setTypeAndData(position, Blocks.AIR.getBlockData(), flag);
++        // Paper end
+ 
+         if (applyPhysics) {
+             return chunk.getHandle().getWorld().setTypeAndData(position, blockData, 3);
+-- 
+2.9.0.windows.1
+