ruleritem.cpp throws an error about incomplete type
'struct gas_pressures'.
'struct gas_pressures' is defined in dive.h, so every header
that has usage of the type needs to include dive.h.
Such a header is profile.h which has 'struct gas_pressures pressures'
in 'struct plot_data', by including dive.h on top of profile.h
every source file (e.g. ruleritem.cpp) that includes profile.h will
now receive knowledge of a complete 'struct gas_pressures' type.
Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>