Nice, animated Rat!
Everything associated with Bonaparte involves propaganda. I can both envision him actually making the statement for effect, and also embellishing the incident after the event. I don't really know how you could conclusively confirm it either way. My guess is that the incident was generally true, but that the exact wording may have been modified for effect.
History is always subjectively recorded, no matter how objective the writer intends to be. It is more a matter of a consciousness contained in an independent body. This forces different perceptions of a shared event. Add to this the fact that it is not immediately recorded, and you greatly increase the disparity of the recollection.