Update libliftoff to version 0.4.1 / rev 3 via SR 1069775
https://build.opensuse.org/request/show/1069775
by user llyyr + dimstar_suse
- Update to 0.4.1
* plane: add NULL check to liftoff_plane_destroy()
* Fix -Wsign-conversion on 32-bit
- drop fix-sign-conversion-32bit.patch as it's included in release