Adrian Chadd 1db2772f43 Make sure any waiters on the scan results get notified if the scan task
decides to do nothing.

If this isn't done, then a scan request whilst a scan occurs in an active
channel set or a completed channel set will hang.

Tested:

* Intel 5100, STA mode
2013-11-29 22:24:57 +00:00
..
2013-11-29 07:55:44 +00:00