Fix a case of writing an empty HexSSID to Shill.

Fix a case of writing an empty HexSSID to Shill.

This surfaced when trying to connect to a fake network setup by fake_shill_manager_client.cc.

Committed: https://crrev.com/3be384afc1fd8127a07918fb2d8ceaa923d76f85
Cr-Commit-Position: refs/heads/master@{#321783}

[pneubeck (no reviews), 2015-03-23 10:55:54]

Patchset #1 (id:1) has been deleted

[pneubeck (no reviews), 2015-03-23 11:01:53]

Patchset #1 (id:20001) has been deleted

[pneubeck (no reviews), 2015-03-23 11:03:01]

pneubeck@chromium.org changed reviewers:
+ stevenjb@chromium.org

[pneubeck (no reviews), 2015-03-23 11:03:01]

this addresses the issue I mentioned to you last Friday.

[stevenjb, 2015-03-23 15:56:14]

The CQ bit was checked by stevenjb@chromium.org

[stevenjb, 2015-03-23 15:56:15]

lgtm

[commit-bot: I haz the power, 2015-03-23 15:56:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1023273004/40001

[commit-bot: I haz the power, 2015-03-23 15:59:40]

Committed patchset #1 (id:40001)

[commit-bot: I haz the power, 2015-03-23 16:00:54]

Patchset 1 (id:??) landed as
https://crrev.com/3be384afc1fd8127a07918fb2d8ceaa923d76f85
Cr-Commit-Position: refs/heads/master@{#321783}