[Qt-interest] checking the return value of connect

[Mandeep Sandhu]

> Considering QObject::connect prints a warning when it can't connect, why were
> you spending time searching for the problem before fixing the warning?

Because of the verbosity of my logs! :) It got lost in the storm of
logs generated (it was running on an embedded box and there was no
color support for different log levels).

-mandeep