Fix bad rendering pathway on user profiles for viewers without Badges application

Summary: Fixes T10275. We'd fatal on $flex not being defined.

Test Plan: Uninstalled badges, viewed profile. Before: fatal; now: no badges element appears but profile renders properly.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10275

Differential Revision: https://secure.phabricator.com/D15182