[Fluxus] misc commits

[Dave Griffiths]

On Sat, 2007-10-20 at 16:33 +0200, gabor papp wrote:
> fc6 rpm of the current cvs version is at http://fluxus.mndl.hu/
> i would be grateful for any feedback if someone uses it.
> 
> i have also found some ways to make fluxus exit:
> 
> (build-cylinder 0 0) causes Floating point exception

fixed this in cvs - and also bounds checked the rest of the
build-primitive functions.

> in REPL:
> select some text before the cursor, e.g. 'fluxus>', press space,
> backspace then enter

also fixed

thanks for these! keep em coming :)

cheers,

dave