libtorc-core: Actually use the return value in TorcCommandLine
libtorc-qml: Add missing constructor.

- kepp cppcheck happy
libtorc-qml: Reduce scope of variable in TorcQMLDisplayX11
libtorc-video: Move member var from TorcBlurayHandler to
TorcBlurayUIHandler
libtorc-video: Replace sscanf usage in TorcBlurayMetadata