changed fence behaviour

src/main/java/net/minecraft/server/BlockFence.java

@@ -0,0 +1,24 @@
+package net.minecraft.server;
+
+import java.util.ArrayList;
+
+public class BlockFence extends Block {
+
+    public BlockFence(int i, int j) {
+        super(i, j, Material.WOOD);
+        this.a(0, 0, 0, 1, (float) 1.5, 1); //Craftbukkit
+    }
+
+    //Removed by craftbukkit
+//    public void a(World world, int i, int j, int k, AxisAlignedBB axisalignedbb, ArrayList arraylist) {
+//        arraylist.add(AxisAlignedBB.b((double) i, (double) j, (double) k, (double) (i + 1), (double) j + 2.0D, (double) (k + 1)));
+//    }
+
+    public boolean a(World world, int i, int j, int k) {
+        return world.getTypeId(i, j - 1, k) == this.id ? false : (!world.getMaterial(i, j - 1, k).isBuildable() ? false : super.a(world, i, j, k));
+    }
+
+    public boolean a() {
+        return false;
+    }
+}