Should fix broken config generation some people have been getting

src/main/java/com/sk89q/worldedit/blocks/BaseBlock.java

@@ -132,6 +132,13 @@ public class BaseBlock {
                 && (data == ((BaseBlock) o).data || data == -1 || ((BaseBlock) o).data == -1);
     }
 
+    @Override
+    public int hashCode() {
+        int ret = type << 3;
+        if (data != (byte)-1) ret |= data;
+        return ret;
+    }
+
     @Override
     public String toString() {
         return "BaseBlock id: " + getType() + " with damage: " + getData();