Wrong shortcut "create new child" links in node's children menu.

The bug appears when node type has "_" characters in its name (like "my_nodetype"). Drupal somehow changes it to "-" in URL (to "my-nodetype"), nodehierarchy doesn't, that is why links "create new child" don't work.

Below I present solution to this problem:

file: nodehierarchy_theme.inc
diff original_file modyfied_file:
85a86
> $key = str_replace("_","-",$key);