Click on Liked by User Avatar does not popup usercard

[cpradio]

How it works on a prior version

Meta: (no usercard is shown)

[codinghorror (Jeff Atwood)]

Ah that is certainly a bug cc @eviltrout

[riking (Kane York)]

It looks like the link is to /users/undefined.

[cpradio]

PR sent
https://github.com/discourse/discourse/pull/3829