Hacking: a new hacking check was added that used an existing number

Commit 243879f5c51fc45f03491bcb78765945ddf76be8 added in a new hacking
check that used an existing number.

The new number is 324 (and not 323)

Change-Id: I7e604a408387438105c435ad16a1fa3d6491b642
Closes-bug: #1356815
Merge "Hacking: a new hacking check was added that used an existing number"