I was egtting a compile error complaining (in effect) abour the lack of
a pid_t type when attempting a compile with MSVC. The attached patch,
which move the definition up in the file win32.h before it is used,
seems to cure the problem.
I am also seeing non-fatal warnings about redefinition of SIG_ERR
SIG_DFL and SIG_IGN which I will investigate.
cheers
andrew