Function gio_sys::g_socket_send_to

pub unsafe extern fn g_socket_send_to(socket: *mut GSocket,
                                      address: *mut GSocketAddress,
                                      buffer: *mut u8,
                                      size: size_t,
                                      cancellable: *mut GCancellable,
                                      error: *mut *mut GError)
                                      -> ssize_t