Comment 2 for bug 895596

this is different than opentopped logic; with opentop, the unit inside uses its own weapon, in an IFV, the unit inside changes the IFVs weapon into a selected weapon that doesn't necessarily have to be one of the passenger units' weapons. Furthermore, it changes the turret graphic and the IFV gets the veterancy for the kills, not the unit inside (because AFAIK units inside an opentop get the veterancy, not the transport).