[An extra null pointer check is not needed in functions](http://dietmar-kuehl.de/mirror/c++-faq/freestore-mgmt.html#faq-16.8) like the following. - [Device](https://github.com/dominicgs/USBProxy/blob/08b6ff9956476b8084179ac7e68868356bdcb467/src/lib/Device.cpp#L168) - [HostProxy_GadgetFS](https://github.com/dominicgs/USBProxy/blob/b35ecf5c82ef38505824b7bebd6153f53278b1df/src/Plugins/Hosts/HostProxy_GadgetFS.cpp#L59) - [Interface](https://github.com/dominicgs/USBProxy/blob/08b6ff9956476b8084179ac7e68868356bdcb467/src/lib/Interface.cpp#L108) - [InterfaceGroup](https://github.com/dominicgs/USBProxy/blob/08b6ff9956476b8084179ac7e68868356bdcb467/src/lib/InterfaceGroup.cpp#L45) - [Manager](https://github.com/dominicgs/USBProxy/blob/2bf417a6e727475e320e6f69902d161b6708e351/src/lib/Manager.cpp#L79)
