Ingredient ordering broken

Ingredients do not resort when weights are changed or rows are dragged.

Code problem is in function recipe_ingredient_autocomplete_validate:

    // Try to find an iid with a name matching the entered ingredient name.
    // recipe_ingredient_id_from_name() creates the ingredient if not found.
    $value = array(
      'quantity' => $element['quantity']['#value'],
      'unit_key' => $element['unit_key']['#value'],
      'iid' => recipe_ingredient_id_from_name($name),
      'name' => $name,
      'note' => $element['note']['#value'],
      '_weight' => $element['_weight']['#value'],              <= this is missing
    );

If someone can help me out with the procedure for correcting (github pull request, patch creation) I can help out.