[Pyusb-users] patch for darwin+macports

[<ros...@la...>]

if you're using macports ( rather than fink ) then you need to modify  
the include paths ( defaults and fink are included but not macports ) .
( macports > darwin ports > the ports collection )

can we include this in the next version please ?

whale:pyusb-0.4.2 rossetti$ diff setup.py.0 setup.py
37a38
 >                        '-L/opt/local/lib',
39c40
<     extra_compile_args = ['-I/sw/include','-I/usr/local/lib']
---
 >     extra_compile_args = ['-I/sw/include','-I/usr/local/lib','-I/ 
opt/local/lib']