If the banjo or other fitting which attaches to the brake line is damaged, get a new one, about $10. If the end of the brake line is damaged where it connects to the fitting, get a new one, about $30-40.
Consider this,
I'm no expert in fluid dynamics or hydraulics, however I do know that brake lines are hydraulic and opperate under pressure. If there's one part of your bike you want to have total confidence in and know that it is done right, mightn't that be your front brake?
Spend the money. Fix it right. It's not just you out on the road.
tony