The `static int defaultWidth[]` definition in divelistview.cpp
could potentially end up missing an element which can later result
in out-of-bounds access when iterating through the list of
columns and updating their widths.
Add a couple of methods in DiveTripModel for setting and getting
the widths and use those. The default values are now pre-set in a
QVector in the DiveTripModel() constructor.
Throw warnings if out-of-bounds columns are requested.
Reported-by: Gaetan Bisson <bisson@archlinux.org>
Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
e3118d915c