Fix facade recipes. Hopefully the last null check fix.

src/main/java/appeng/items/materials/ItemMaterial.java

@@ -37,6 +37,7 @@ import net.minecraft.creativetab.CreativeTabs;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.item.EntityItem;
 import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.init.Items;
 import net.minecraft.inventory.IInventory;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
@@ -220,7 +221,7 @@ public final class ItemMaterial extends AEBaseItem implements IStorageComponent,
 					{
 						for( final ItemStack is : options )
 						{
-							if( !is.isEmpty() && is.getItem() != null )
+							if( !is.isEmpty() && is.getItem() != Items.AIR )
 							{
 								replacement = is.copy();
 								break;

src/main/java/appeng/items/parts/ItemFacade.java

@@ -81,7 +81,7 @@ public class ItemFacade extends AEBaseItem implements IFacadeItem, IAlphaPassIte
 		try
 		{
 			final ItemStack in = this.getTextureItem( is );
-			if( in != null )
+			if( !in.isEmpty() )
 			{
 				return super.getItemStackDisplayName( is ) + " - " + in.getDisplayName();
 			}
@@ -112,7 +112,7 @@ public class ItemFacade extends AEBaseItem implements IFacadeItem, IAlphaPassIte
 				try
 				{
 					final Item item = Item.getItemFromBlock( b );
-					if( item == null )
+					if( item == Items.AIR )
 					{
 						continue;
 					}
@@ -122,7 +122,7 @@ public class ItemFacade extends AEBaseItem implements IFacadeItem, IAlphaPassIte
 					for( final ItemStack l : tmpList )
 					{
 						final ItemStack facade = this.createFacadeForItem( l, false );
-						if( facade != null )
+						if( !facade.isEmpty() )
 						{
 							this.subTypes.add( facade );
 						}
@@ -153,13 +153,13 @@ public class ItemFacade extends AEBaseItem implements IFacadeItem, IAlphaPassIte
 
 	public ItemStack createFacadeForItem( final ItemStack l, final boolean returnItem )
 	{
-		if( l == null )
+		if( l.isEmpty() )
 		{
 			return ItemStack.EMPTY;
 		}
 
 		final Block b = Block.getBlockFromItem( l.getItem() );
-		if( b == null || l.hasTagCompound() )
+		if( b == Blocks.AIR || l.hasTagCompound() )
 		{
 			return ItemStack.EMPTY;
 		}
@@ -205,7 +205,7 @@ public class ItemFacade extends AEBaseItem implements IFacadeItem, IAlphaPassIte
 	public FacadePart createPartFromItemStack( final ItemStack is, final AEPartLocation side )
 	{
 		final ItemStack in = this.getTextureItem( is );
-		if( in != null )
+		if( !in.isEmpty() )
 		{
 			return new FacadePart( is, side );
 		}
@@ -265,14 +265,14 @@ public class ItemFacade extends AEBaseItem implements IFacadeItem, IAlphaPassIte
 
 		ItemStack baseItemStack = getTextureItem( is );
 
-		if( baseItemStack == null )
+		if( baseItemStack.isEmpty() )
 		{
 			return Blocks.GLASS.getDefaultState();
 		}
 
 		Block block = Block.getBlockFromItem( baseItemStack.getItem() );
 
-		if( block == null )
+		if( block == Blocks.AIR )
 		{
 			return Blocks.GLASS.getDefaultState();
 		}

src/main/java/appeng/items/tools/powered/ToolColorApplicator.java

@@ -243,7 +243,7 @@ public class ToolColorApplicator extends AEBasePoweredItem implements IStorageCe
 		{
 			final NBTTagCompound color = c.getCompoundTag( "color" );
 			final ItemStack oldColor = new ItemStack( color );
-			if( oldColor != null )
+			if( !oldColor.isEmpty() )
 			{
 				return oldColor;
 			}

src/main/java/appeng/items/tools/powered/ToolEntropyManipulator.java

@@ -289,7 +289,7 @@ public class ToolEntropyManipulator extends AEBasePoweredItem implements IBlockT
 				{
 					final ItemStack result = FurnaceRecipes.instance().getSmeltingResult( i );
 
-					if( result != null )
+					if( !result.isEmpty() )
 					{
 						if( result.getItem() instanceof ItemBlock )
 						{