Unnecessary `cglobal` in `cglobal(dlsym(...))`

https://github.com/ronisbr/TextUserInterfaces.jl/blob/b35b4401a8d8c7e93f439d5f0ca51ba0f64a9cf2/src/submodules/NCurses/NCurses.jl#L97

This should probably just be `dlsym(ncurses.libncurses, :stdscr)`, the extra `cglobal` call is unnecessary