profile.c: fix a bug in calculate_gas_information_new()

In a test case loading dives/test35.xml results in a infinite(-like)
loop (Note: possibly requires the partial pressure plots enabled).

calculate_gas_information_new() has an 'if' branch to
update the cylinderindex to a dive's diluent_cylinder_index,
but it does not consider that said index can be set previously
to -1.

This results in a random neighbour memory assigned as
&dive->cylinder[-1].gasmix and passed to fill_pressures(..).

Following the calculations in the function the He gas,
can receive a bad value (e.g. for the test case in the
E+6 ranges).

Said value is then used in DivePlotDataModel()::pheMax()
(defined by MAX_PPGAS_FUNC()) resulting in one of the loops
(the 3rd one) in DiveCartesianAxis::updateTicks() to
loop indefinitely.

Fixes #759

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

0 files changed, 0 insertions, 0 deletions