Don't let trees replace any block when growing

CraftBukkit-Patches/0100-Don-t-let-trees-replace-any-block-when-growing.patch

@@ -0,0 +1,27 @@
+From 5922d8a6287ae42098999994a8596e99ca181da1 Mon Sep 17 00:00:00 2001
+From: Thinkofdeath <thethinkofdeath@gmail.com>
+Date: Mon, 20 Jan 2014 20:42:28 +0000
+Subject: [PATCH] Don't let trees replace any block when growing
+
+
+diff --git a/src/main/java/net/minecraft/server/WorldGenForestTree.java b/src/main/java/net/minecraft/server/WorldGenForestTree.java
+index 71ce973..caaac9a 100644
+--- a/src/main/java/net/minecraft/server/WorldGenForestTree.java
++++ b/src/main/java/net/minecraft/server/WorldGenForestTree.java
+@@ -132,7 +132,12 @@ public class WorldGenForestTree extends WorldGenTreeAbstract implements BlockSap
+                                 int k3;
+ 
+                                 for (k3 = 0; k3 < j3; ++k3) {
+-                                    this.setTypeAndData(world, i + l2, k2 - k3 - 1, k + i3, Blocks.LOG2, 1);
++                                    Block block = world.getType(i + l2, k2 - k3 - 1, k + i3);
++
++                                    if (block.getMaterial() == Material.AIR || block.getMaterial() == Material.LEAVES)
++                                    {
++                                        this.setTypeAndData(world, i + l2, k2 - k3 - 1, k + i3, Blocks.LOG2, 1);
++                                    }
+                                 }
+ 
+                                 int l3;
+-- 
+1.8.4.msysgit.0
+