thread-utils: build with NO_PTHREADS fails

Hello all,

I think that no one tried it for a long time but I needed a single-threaded git version for debug purpose. I tried to build with -DNO_PTHREADS and thread-utils.c failed to compile.

In brief the situation is the following:

in header file we have something like that:


#ifndef NO_PTHREAD
extern int online_cpus(void);

#else
#define online_cpus() 1
#endif // NO_PTHREAD

and in *.c file:


int online_cpus(void)
{
    // ...
}

So the compilation fails with: 

test.c:3:21: error: macro "online_cpus" passed 1 arguments, but takes just 0
 int online_cpus(void)

That's a tiny issue, but maybe we could apply a straight-forward solution (see attached diff)? If you agree I'll prepare a properly-formatted [PATCH] submit.


--
Best Regards,
Victor