void DivePlannerPointsModel::setupCylinders() in diveplannermodel.cpp
handles setting up cylinders for the planner. If there is a current
dive, cylinders form that dive are copied. Otherwise the default
cylinder is added and lacking that a standard size cylinder.
If the current dive does not have any cylinders, we could end up
without cylinders. This patch adds a test for this case and delegates
to the other two sources of a cylinder in that case.
Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>