message: Fix null plug
diff: @@ -61,7 +61,7 @@ class D2ItemTransformer {
  return null;
  }
  - const allPlugs = _.pluck(_.pluck(item.sockets.sockets, 'plug'), 'hash');
  + const allPlugs = _.compact(_.pluck(_.pluck(item.sockets.sockets, 'plug'), 'hash'));
  return _.difference(allPlugs, this._getPowerMods(item));
  }
  