Limited walks return empty

[fizx]

I didn't see a high level test case that I could add a regression spec to. Assuming @c is a fibered-out wrapper around a fraggle client, the last line of this test case fails with 0 != 1.

rev = @c.rev
@c.set(rev, "/a/b", "hi")
@c.set(rev, "/a/c", "bye")

@c.getdir(@c.rev, "/a").size.should == 2
@c.getdir(@c.rev, "/a", 0, 1).size.should == 1