[ptx] wxwin and gcc 4.0

[Daniel M. German]

 Philipp Krueckel twisted the bytes to say:

 Philipp> Hi Daniel & Pablo,
 Philipp> g++ complains for a reason about:

 Philipp> g++: unrecognized option `-pthread'

 Philipp> It has to be -lpthread.

 Philipp> Philipp

Thanks for the feedback Phillip. THat is just a warning (it appears in
each file compiled) but it does not abort the compilation. I'll give
it a try regardless.

--
daniel