QtIFW

Warn whenever (auto)dependencies are not leaf nodes.

Whenever any source or destination node
of dependency link or any destination node
of autodependency link has
children, warn about it. Maintenance tool
isn't able to handle such cases properly.

Change-Id: Ifaf3fbb7903eb960ab8fd977c4f47b7906900115
Reviewed-by: Niels Weber <niels.weber@theqtcompany.com>