4.2 of node map generation doesn't mention the node map property

[gkellogg]

Recursively call this algorithm passing the value of element's @list member for element, active graph, active subject, active property, and result for list.

No mention of passing in node map, but presumably you'd pass in the current node map variable you have.

Original issue: 4.2 of node map generation doesn't mention the node map property #655.