(ITS#6603) EAGAIN, EWOULDBLOCK occasionally used without checking #ifdef

[h.b.furuseth@usit.uio.no]

> At least in libldap and liblber EAGAIN and EWOULDBLOCK are
> occasionally used without checking whether they are defined or not.
> Either the checks should be removed, counting on the fact that these
> error codes are always defined, or they should be used consistently.

I'd say the libldap #ifdefs can safely be removed by now: "cvs annotate"
says os-ip.c has had unconditional EWOULDBLOCK since rev 1.34 (Aug
1999), and request.c unconditional EAGAIN since rev 1.85 (Aug 2002).
No bug reports since then...

We need to keep the '#if EWOULDBLOCK != EAGAIN's in switches, though.

liblber always #ifdefs them, except in a test program.  I suppose these
#ifdefs could stay in case someone uses the liblber source stand-alone.

-- 
Hallvard