Fix a very important bug when streaming pointer through QVariant for
containers. The QVariant that receives the stream must be reinitialize
at each step, otherwise it keeps the same poiinter to stream the data.
In other words, it was the same pointer that was push_back in the container.
Finalize ZUC.
Merge branch 'master' of github.com:d-tk/dtk
Merge branch 'master' of github.com:d-tk/dtk into dtkPluginStore