I don't know about that instance in particular but that's not to say it didn't happen. As new sound mixes were created over the first few years, I think different sounds and lines were tinkered with.

The only one that I definitely know of is during Han and Chewie's escape from the Death Star.

You can hear a Trooper shouting "close the blast doors". Then once they're closed, a Trooper hurriedly shouts, "open the blast doors, open the blast doors!" I can't remember which, but one of those two lines was added at a later date, I'm sure.