this patch reverses the item if we have a pipe-connection but blocked exit, and fixes the "every output blocked"-bug of the iron pipe

ironpipe-drop.patch

diff --git a/buildcraft/common/net/minecraft/src/buildcraft/transport/PipeLogicIron.java b/buildcraft/common/net/minecraft/src/buildcraft/transport/PipeLogicIron.java
index d654489..dcd5345 100755
--- a/buildcraft/common/net/minecraft/src/buildcraft/transport/PipeLogicIron.java
+++ b/buildcraft/common/net/minecraft/src/buildcraft/transport/PipeLogicIron.java
@@ -112,8 +112,13 @@ public class PipeLogicIron extends PipeLogic {
 	
 	@Override
 	public boolean outputOpen(Orientations to) {
-		return to.ordinal() == worldObj
-				.getBlockMetadata(xCoord, yCoord, zCoord);
+		int metadata = worldObj.getBlockMetadata(xCoord, yCoord, zCoord);
+		if (metadata > 5) {
+			metadata = 0;
+			worldObj.setBlockMetadata(xCoord, yCoord, zCoord, metadata);
+		}
+
+		return to.ordinal() == metadata;
 	}
 		
 }
diff --git a/buildcraft/common/net/minecraft/src/buildcraft/transport/PipeTransportItems.java b/buildcraft/common/net/minecraft/src/buildcraft/transport/PipeTransportItems.java
index bb398ec..08f7c17 100755
--- a/buildcraft/common/net/minecraft/src/buildcraft/transport/PipeTransportItems.java
+++ b/buildcraft/common/net/minecraft/src/buildcraft/transport/PipeTransportItems.java
@@ -121,6 +121,22 @@ public class PipeTransportItems extends PipeTransport {
 			}
 		}
 		
+		if(result.size() == 0) {
+			boolean output = true;
+			for (int o = 0; o < 6; ++o) {
+				Position newPos = new Position(pos);
+				newPos.orientation = Orientations.values()[o];
+				newPos.moveForwards(1.0);
+				TileEntity tile = worldObj.getBlockTileEntity((int)newPos.x, (int)newPos.y, (int)newPos.z);
+				
+				if(container.pipe.isPipeConnected(tile) && !container.pipe.outputOpen(Orientations.values()[o]))
+					output = false;
+			}
+			// we have a pipe, but no open output
+			if(!output)
+				result.add(pos.orientation.reverse());
+		}
+		
 		if (this.container.pipe instanceof IPipeTransportItemsHook) {
 			result = ((IPipeTransportItemsHook) this.container.pipe)
 					.filterPossibleMovements(result, pos, item);