Berthold Stoeger 62b869b24a CylindersModel: don't crash if accessing non-existing cylinder
It shouldn't happen, but currently we overwrite the displayed_dive
without updating the CylindersModel. Thus, CylindersModel may now
crash when the new displayed_dive has less cylinders than the old
one.

For now, catch this condition. Treat the root cause later.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
2020-01-30 19:33:21 +02:00
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