Hotfix WallAttribute

Signed-off-by: yoyosource <yoyosource@nidido.de>

BauSystem_Main/src/de/steamwar/bausystem/features/attributescopy/impl/type/WallAttribute.java

@@ -44,6 +44,7 @@ public class WallAttribute implements BlockAttribute<Wall> {
     public void copy(List<String> attributes, Wall blockData) {
         if (blockData.isUp()) attributes.add(attribute1);
         for (BlockFace face : faces) {
+            if (blockData.getHeight(face) == Wall.Height.NONE) continue;
             attributes.add(attribute2 + face.name().toLowerCase() + " " + blockData.getHeight(face).name().toLowerCase());
         }
     }