link_path_walk: nd->depth massage, part 3

remove decrement/increment surrounding nd_alloc_stack(), adjust the
test in it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-05-03 20:52:15 -04:00
commit da4e0be04d