The check to only update the dive if there were already dives selected
before seems bogus. I'm sure I put it there for a reason but it seems
flat out wrong.
This gets triggered when you select a trip by clicking on the trip
header. In that case all dives get unselected (amount_selected = 0) and
then we try to select the first dive in the trip - which fails because
of this check.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
ca1c112424