(cygwin_inet_network): Return INADDR_NONE instead of 0 in case of EFAULT. (cygwin_hstrerror): Add parameter checking. (cygwin_rresvport): Ditto. (socketpair): Ditto. * winsup.h (check_null_str): Add extern declaration.
(cygwin_inet_network): Return INADDR_NONE instead of 0 in case of EFAULT. (cygwin_hstrerror): Add parameter checking. (cygwin_rresvport): Ditto. (socketpair): Ditto. * winsup.h (check_null_str): Add extern declaration.