tty: n_smux: Clarify test messages

Clarify test messages for list-empty reporting to avoid confusing
the list-empty flag with an event count value.

Change-Id: I31aeb6feb89ada5f7d5b691432b5d8f4aba64cc8
Signed-off-by: Eric Holmberg <eholmber@codeaurora.org>
1 file changed