Interesting question, the rules contradict themselves on this point:
"The big benefit of knowing a rote spell is that
you don’t have to roll Discipline to control it. It’s
assumed that you can control the spell energy at
a level equal to your Discipline score, allowing
you to act as if you’d rolled a zero on the dice
every time."
The first sentence basically says that you don't need to worry about the control roll at all; the second sentence, taken literally, would imply that if you take a supplemental action your final result would count as missing by 1. I think I'm going to have to agree with Haru. You can still cast the spell, but the extra parameter throws an extra -1 into the final result.
I think, though, that in this case I'd probably houserule this to allow the caster to take advantage of his actual roll, if it was enough to control the spell with the penalty added. That is, if his attack roll was at least +1, then his control roll would have succeeded, so I'd let the caster count that as his control roll, too. If not, then the default '0' would stand, and he'd have to deal with backlash/fallout or invoke an aspect to make up the difference.