[Bug 1055270] [KK Only][Flame][Camera] Face detection coordinates are in...

...verted
This two step process with the temporary x and y variables makes the code more confusing to me.  I think it would be clearer if each of these cases just had face.x = foo; face.y = -bar; or whatever.  If this is how it makes sense to you, I don't really have a problem with it.