The wrong O2 percentage was due to not referring to the correct cylinder
but grabbing any o2 value in any cylinder. While fixing this, I noticed
that also end pressure was missing the cylinder selection, so fixing
that as well.
Fixes#626
Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>