Steps to reproduce:

1. Go to https://secure.phabricator.com/paste/query/active/ (version as of now)
2. Look at the right of Paste content previews, where Paste creation date, length, and author are listed.

Expected behavior:
Paste length is displayed correctly.

Actual behavior:
Any Pastes with more than 5 lines display "5 lines". Might be the preview length on that very page instead of their actual length.

Upstreamed from https://phabricator.wikimedia.org/T140324 (and pretty minor...)