From c09772d5d403f935957b7543943e97402b5e8874 Mon Sep 17 00:00:00 2001
From: SpaceToad <spacetoadcraft@gmail.com>
Date: Tue, 6 May 2014 09:38:16 +0200
Subject: [PATCH] Added a more generic air storage avoidance in blueprints,
 close #1712.

---
 common/buildcraft/core/blueprints/Blueprint.java | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/common/buildcraft/core/blueprints/Blueprint.java b/common/buildcraft/core/blueprints/Blueprint.java
index d2022094..52162bf5 100644
--- a/common/buildcraft/core/blueprints/Blueprint.java
+++ b/common/buildcraft/core/blueprints/Blueprint.java
@@ -77,6 +77,13 @@ public class Blueprint extends BlueprintBase {
 		BptContext bptContext = (BptContext) context;
 		Block block = anchorTile.getWorldObj().getBlock(x, y, z);
 
+		if (context.world().isAirBlock(x, y, z)) {
+			// Although no schematic will be returned for the block "air" by
+			// the registry, there can be other blocks considered as air. This
+			// will make sure that they don't get recorded.
+			return;
+		}
+
 		SchematicBlock slot = SchematicRegistry.newSchematicBlock(block);
 
 		if (slot == null) {