Allow air as an orebfuscator block

CraftBukkit-Patches/0068-Orebfuscator.patch

@@ -1,4 +1,4 @@
-From b1f48210131c8ca7b879452ca7b60a4bd578a826 Mon Sep 17 00:00:00 2001
+From 7fc2e775270cd5909fc9dd80b84c4883a2226df5 Mon Sep 17 00:00:00 2001
 From: md_5 <md_5@live.com.au>
 Date: Thu, 16 May 2013 18:51:05 +1000
 Subject: [PATCH] Orebfuscator
@@ -86,10 +86,10 @@ index 5b0875d..1aca7f6 100644
      public void b(int i, int j, int k, Block block, int l) {
 diff --git a/src/main/java/org/spigotmc/AntiXray.java b/src/main/java/org/spigotmc/AntiXray.java
 new file mode 100644
-index 0000000..8230ff1
+index 0000000..30280d4
 --- /dev/null
 +++ b/src/main/java/org/spigotmc/AntiXray.java
-@@ -0,0 +1,188 @@
+@@ -0,0 +1,189 @@
 +package org.spigotmc;
 +
 +import gnu.trove.set.TByteSet;
@@ -122,12 +122,13 @@ index 0000000..8230ff1
 +        {
 +            Block block = Block.e( i );
 +            // Check it exists and is not a tile entity
-+            if ( block != null && !block.isTileEntity() )
++            if ( block != null && block.isTileEntity() )
 +            {
++                continue;
++            }
 +            // Add it to the set of replacement blocks
 +            blocks.add( (byte) (int) i );
 +        }
-+        }
 +        // Bake it to a flat array of replacements
 +        replacementOres = blocks.toArray();
 +    }