I suppose I could look up the real line at IMDB...

Couldn't resist...

Blazing Saddles (1974)
Mexican Bandit: Badges? We don't need no stinking badges!

Treasure of the Sierra Madre, The (1948)
Gold Hat: Badges? We ain't got no badges. We don't need no badges. I don't have to show you any stinking badges.

I'm think the "Play it again, Sam" line falls under the same category: A slight misquote that's stuck over the years. Odd that they're both for Bogart films...