tlibio: use a union of sigval instead of sigval_t

sigval_t is glibc only construct, we use a union of sigval
which pretty much is same effect as sigval_t. POSIX defines
it that way too:
  http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/signal.h.html

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Acked-by: Cyril Hrubis <chrubis@suse.cz>
Signed-off-by: Jan Stancek <jstancek@redhat.com>
1 file changed