Adding New Ingredients Fails with Experimental 6.x code

I tried the experimental code available at your external site, and found that it would not create new ingredients. I do not profess to be much of a Drupal programmer.

However, it looks like the problem is in recipe_ingredient_id_from_name($name), at the point where it tries to set $node_link. This is the point in the code where we've determined that the ingredient is not in the database. I do not understand why $node_link needs to be set, or why it needs to go into the link field, but it is clear that it needs to be set to something real. A null value fails.