QWSLock errors

[Neil Jerram]

Radek Polak <psonek2 at seznam.cz> writes:

> On Thursday, November 08, 2012 09:12:40 AM Neil Jerram wrote:
>
>> With current QtMoko git I'm seeing a lot of QWSLock errors in my log,
[...]
>
> To me it looked that the semaphore was closed by the other process or thread. 
> The logging and some other stuff was added there in Qt 4.8.

I believe I've understood and fixed this - please see the attached
patch.  I've been running with this change for a week and a bit now,
with no apparent bad consequences, so I guess it's OK to go into the
main repository.

Regards,
        Neil