[Interest] QtSingleApplication Fix for Windows

[Nils Jeisecke]

Hi List,

some time ago I've submitted a fix for a QtSingleApplication problem.
The current implementation does not reliably prevent starting multiple
instances on Windows .

There does not seem to be a maintainer for Qt Solutions. So I'd
welcome anyone interested in reviewing this one line change:

https://codereview.qt-project.org/#change,44118

I've checked this on Mac OS X and Linux and it doesn't show any
negative impact there.

Best regards

Nils