confusing `Safety` comment for `Device::udev_device`

[m4rch3n1ng]

the Device::udev_device method has a safety comment saying you have to make sure that you pass in the same udev Context as the one that you used to create the libinput one.

input.rs/src/device.rs

Lines 351 to 366 in 40b31d3

	/// # Safety
	///
	/// The result of this function is not definied if the passed udev `Context`
	/// is not the same as the one the libinput `Context` was created from.
	#[cfg(feature = "udev")]
	pub unsafe fn udev_device(&self) -> Option<UdevDevice> {
	let dev: *mut udev_device = ffi::libinput_device_get_udev_device(self.ffi) as *mut _;
	if dev.is_null() {
	None
	} else {
	// We have to ref the returned udev context as udev_device_get_udev does not
	// increase the ref_count but dropping a UdevDevice will unref it
	let ctx: *mut udev_context = udev_ref(udev_device_get_udev(dev));
	Some(UdevDevice::from_raw_with_context(ctx, dev))
	}
	}

but that context hasn't been passed in since ea8e779, so i wanted to know: does that function still need to be unsafe? if yes, what do i, as the caller, have to ensure so i don't cause undefined behaviour?

thanks