Improved Blocking Behavior for interfaces with inventories on multiple sides.

AE now ignores inventories that have no sizes this will improve a few strange behaviors.

helpers/DualityInterface.java

@@ -740,6 +740,8 @@ public class DualityInterface implements IGridTickable, ISegmentedInventory, ISt
 			TileEntity tile = iHost.getTileEntity();
 			World w = tile.getWorldObj();
 
+			boolean allAreBusy=true;
+			
 			for (ForgeDirection s : possibleDirections)
 			{
 				TileEntity te = w.getTileEntity( tile.xCoord + s.offsetX, tile.yCoord + s.offsetY, tile.zCoord + s.offsetZ );
@@ -747,13 +749,15 @@ public class DualityInterface implements IGridTickable, ISegmentedInventory, ISt
 				InventoryAdaptor ad = InventoryAdaptor.getAdaptor( te, s.getOpposite() );
 				if ( ad != null )
 				{
-					if ( ad.simulateRemove( 1, null, null ) != null )
+					if ( ad.simulateRemove( 1, null, null ) == null )
 					{
-						busy = true;
+						allAreBusy = false;
 						break;
 					}
 				}
 			}
+			
+			busy = allAreBusy;
 		}
 
 		return busy;
@@ -804,6 +808,12 @@ public class DualityInterface implements IGridTickable, ISegmentedInventory, ISt
 			InventoryAdaptor ad = InventoryAdaptor.getAdaptor( te, s.getOpposite() );
 			if ( ad != null )
 			{
+				if ( isBlocking() )
+				{
+					if ( ad.simulateRemove( 1, null, null ) != null )
+						continue;
+				}
+				
 				if ( acceptsItems( ad, table ) )
 				{
 					for (int x = 0; x < table.getSizeInventory(); x++)

util/InventoryAdaptor.java

@@ -65,11 +65,16 @@ public abstract class InventoryAdaptor implements Iterable<ItemSlot>
 		}
 		else if ( te instanceof ISidedInventory )
 		{
-			return new AdaptorIInventory( new WrapperMCISidedInventory( (ISidedInventory) te, d ) );
+			ISidedInventory si =(ISidedInventory)te;
+			int[] slots = si.getAccessibleSlotsFromSide( d.ordinal() );
+			if ( si.getSizeInventory() > 0 && slots != null && slots.length > 0 )
+				return new AdaptorIInventory( new WrapperMCISidedInventory( si, d ) );
 		}
 		else if ( te instanceof IInventory )
 		{
-			return new AdaptorIInventory( (IInventory) te );
+			IInventory i =(IInventory)te;
+			if ( i.getSizeInventory() > 0 )
+				return new AdaptorIInventory( i );
 		}
 
 		return null;