Mortars sometimes do an unwanted swivel when player deploys

[Matt Hands]

I think while holding down the left or right key while deploying or soon after. Almost certainly multi-player only. A slight nuisance I have noticed but not a big deal.

[Matt Hands]

Believe this is fixed in commit 3715aff.

Suspect mortar weapon pawn needs to record StoredVehicleRotation, same as other weapon pawns. The variable appears unused (in UScript) but I have observed it must be used by native code, as if it is omitted then you get an unwanted camera swivel on entering a turret.

In MP it can go wrong due to replication timing issues, as is usually set in ClientKDriverEnter() function, but at that point a net client may not have the VehicleBase actor reference. The fix is the same as other weapon pawns: if don't have base then set a flag and do it when PostNetReceive() gets the VB ref.

It certainly can't hurt, anyway.