Try even harder not to loop

Another try at #382

Author: davenonymous

src/main/java/org/dave/compactmachines3/block/BlockBaseTunnel.java

@@ -74,6 +74,12 @@ public void neighborChanged(IBlockState state, World world, BlockPos pos, Block
             return;
         }
 
+        BaseTileEntityTunnel tunnel = (BaseTileEntityTunnel)world.getTileEntity(pos);
+        if(tunnel.alreadyNotifiedOnTick) {
+            return;
+        }
+
+        tunnel.alreadyNotifiedOnTick = true;
         notifyOverworldNeighbor(pos);
     }
 

src/main/java/org/dave/compactmachines3/tile/BaseTileEntityTunnel.java

@@ -4,6 +4,7 @@
 import net.minecraft.item.ItemStack;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.EnumFacing;
+import net.minecraft.util.ITickable;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.WorldServer;
 import org.dave.compactmachines3.block.BlockTunnel;
@@ -12,7 +13,9 @@
 import org.dave.compactmachines3.world.tools.DimensionTools;
 import org.dave.compactmachines3.world.tools.StructureTools;
 
-public class BaseTileEntityTunnel extends TileEntity {
+public class BaseTileEntityTunnel extends TileEntity implements ITickable {
+    public boolean alreadyNotifiedOnTick;
+
     public EnumFacing getMachineSide() {
         return this.getWorld().getBlockState(this.getPos()).getValue(BlockTunnel.MACHINE_SIDE);
     }
@@ -34,4 +37,9 @@ public ItemStack getConnectedPickBlock() {
         IBlockState state = realWorld.getBlockState(outsetPos);
         return state.getBlock().getItem(world, outsetPos, state);
     }
+
+    @Override
+    public void update() {
+        alreadyNotifiedOnTick = false;
+    }
 }