Current page only doesn't work

There seems to be a bug in print.module when current page only setting is enabled.

The line in question (351) reads:

$path = ($print_html_link_use_alias && isset($node->path)) ? $node->path : $node->nid;

Meanwhile, $node is not exposed to print_node_view_alter().

My solution was to user $build['#node'] instead, so the line reads

$path = ($print_html_link_use_alias && isset($build['#node']->path)) ? $build['#node']->path : $build['#node']->nid;

Not sure if it's correct though, so no patch for now.