[fluxus] plt commits

[nik gaffney]

> They look fine, could you commit these changes?
> I'm surprised these were the only changes needed - what happens when you
> try to run it?

im not sure if they would be the only required changes, but the libs compile
at least. the errors im getting now are "Symbol not found" when trying to
(load-extension fluxus-engine.dylib), but according to nm the referenced
symbols are there, so im back to poking it with random linker flags and
reading the mzc manual ;)