If you are nearly 100% renegade than I doubt it'll be a problem. Hardest check in the game is 80% (I think...), and you've gotten some free points along the way (certain missions. Also if you imported). I don't think missing 45 points when there are over 1300 in the game will sink your chances. --- http://i.imgur.com/ilv68.gif
You'll be fine. One big Paragon decision like this will not hurt your overall Renegade status and vice versa. If you've been making mostly Renegade decisions and have accumulated lots of Renegade points, the Paragon points you've earned here won't hurt your ability to use Intimidate in the future. I did the same thing with my Renegade playthrough and suffered no ill effects.