gem.c:464 Redundant operations?

Hello, everybody,

my name is Sergio Rodríguez Arbeo and I'm a GSoC (Google Summer of
Code) student working on RMagick4J (the port of RMagick to JRuby).
Because of this, I have to read code of both RMagick and ImageMagick.
In the line 464 of the gem.c file, there is the following expression:

(( ((max-b)/6.0)+ (delta/2.0))- (((max-g)/6.0)+(delta/2.0)))/delta;

I think it is equals to the expression:

(g-b)*delta/6.0

What do you think?

Regards,

Serabe (Sergio Rodríguez Arbeo)

P.S. This is the way I figure out the new expression:

(( ((max-b)/6.0)+ (delta/2.0))- (((max-g)/6.0)+(delta/2.0)))/delta;

(( (max-b)/6.0)+ (delta/2.0)- ((max-g)/6.0)-(delta/2.0))/delta;

(( (max-b)/6.0) - ((max-g)/6.0))/delta;

( ( (max-b) - (max-g) )/6.0 )/delta

( ( max - b  - max + g )/6.0 )/delta

( (- b + g )/6.0 )/delta

( (g - b)/6.0 )/delta

(g - b) * delta /6.0

-- 
http://www.serabe.com