Initialize $files variable in filefield_get_node_files()

Could I suggest initializing the $files variable in filefield_get_node_files() to an empty array, that way external callers won't have to check the return prior to iterating in a foreach loop.

Currently if no files are attached to a node, then a NULL is returned and foreach throws warnings.

function filefield_get_node_files($node, $field = NULL) {
  $files = array();
  ...

  return $files;
}

Thanks,

Ron.