Dave,
A friend had a spanish double sidelock from a well known mid grade maker that had definite bend upward. It was very evident when you turned the gun on it's side and looked down the barrels.
On your gun, I'd turn it on its side and look down the tubes and see if they're straight. If they are already bent down, I'd straighten them.
I have no problem with bending barrels and have straightened some here for a member after they had been impact damaged by what looked like they were slammed in a door.
However, if they are straight now, like Franc I also think a look at the stock fit check is in order first. If the stock fit is right, then you might consider bending them. Your sight picture needs to be verified first, IMO.
If you do decide to bend them or straighten already bent barrels, I'd recommend soft wood blocks and a large hydraulic arbor press. I used simple 2x4's. Barrel sets bend up and down pretty easily, but require over bend due to the spring-back. figuring out the spring-back is trial and error.