Declared sock_cmd in Controller constructor. This fixed a problem in the destructor if the controller runs as a separate process.
Declared sock_cmd in Controller constructor. This fixed a problem in the
destructor if the controller runs as a separate process.

daviddeng/azrael,daviddeng/azrael,daviddeng/azrael,olitheolix/azrael,olitheolix/azrael,daviddeng/azrael,daviddeng/azrael,olitheolix/azrael,olitheolix/azrael,olitheolix/azrael