Well, from reading the Dragonlord Host warscroll battalion, you could still fail the charge, but then you'd be able to have another go in the Charge phase.
I guess then it depends whether the charging unit has abilities that kick in at the end of the charge, some units get a chance to inflict mortal wounds if they complete a charge, that could potentially kill off a small unit or weakened unit, or damage it enough that in the shooting phase it could be finished off, meaning that the unit could then make another charge in the charge phase.