[Fluxus] pixels-burn broken

[gabor papp]

hi Kassen,

thanks for the report.

> I put a bug on the Savannah tracker about pixels-burn.
> In particular; the relevant example fails to run, apparently trying to
> apply a "-" to the final argument, which is the colour vector.
hopefully it is now fixed. on one hand, the example was wrong, because the 
last argument should be a number, instead of a vector. on the other hand, 
(pixels-burn) when we had the vector operators (vadd, vsub, etc) written 
in c++. the old version of these functions presumed all 4 element 
vectors (dVector in c++). now these are moved to scheme and work with 
arbitrary vector lengths, but require that the vector sizes match. this 
cause problems with (pixels-burn) and (pixels-dodge).

i rebuilt the helpmap, and found some problems with the french translation 
in maths.ss. "Retour :" instead of "Retour:". fixed those as well.

best,
gabor