Air is a special gas that does not contain oxygen according
to gasmix.o2.fraction. If you want to use the fo2, you
need to use get_o2() to treat this special case correctly.
This fixes a bug when setting the MND of a gas containing
21% oxygen when o2 is considered not narcotic.
Reported-by: Christoph Gruen <gruen.christoph@gmail.com>
Signed-off-by: Robert C. Helling <helling@atdotde.de>
For some reason, this test seems not to run effectively, at least
locally, I had to update the reference file.
Added a check that indeed the file to be compared was
successfully opened.
Signed-off-by: Robert C. Helling <helling@atdotde.de>
