skip warning

[renatose]

as mode_last == mode_loop, Mode::Loop == vlc::mode_last
this way the warning is skipped

[RSATom]

it was maid so just to avoid possible problems if order of items in playback_mode_e will be changed by some reason. So it's better fix this warning by reinterpret_cast<playback_mode_e>(mode)

[RSATom]

btw, it worth add there check for values below 0 too since enums by default are signed.