[v3] FP printing, take 3

[Paolo Carlini]

Jerry Quinn wrote:

>Benjamin Kosnik writes:
> > Patch is mal formed, again. Please cvs add src/floatconv.cc, and then cvs diff
> > -c -p -N src/floatconv.cc to get the diff for this new file.
>
>Grr.  This one should be OK.
>  
>
Another, minor, observation: we should avoid this warning at build time:

/home/paolo/Gcc/cvs-dirs/gcc-head-build/i686-pc-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1335: 
warning: unused parameter '__mod'

Paolo.