[PATCH] Use _SIG_VALID macro in lib/libthr/thread/thr_sig.c

[Garrett Cooper]

    Found another item that could be converted over to _SIG_VALID in
libthr's thr_sig.c this time.
Thanks,
-Garrett

Index: lib/libthr/thread/thr_sig.c
===================================================================
--- lib/libthr/thread/thr_sig.c	(revision 206173)
+++ lib/libthr/thread/thr_sig.c	(working copy)
@@ -194,7 +194,7 @@
 _sigaction(int sig, const struct sigaction * act, struct sigaction * oact)
 {
 	/* Check if the signal number is out of range: */
-	if (sig < 1 || sig > _SIG_MAXSIG || sig == SIGCANCEL) {
+	if (!_SIG_VALID(sig) || sig == SIGCANCEL) {
 		/* Return an invalid argument: */
 		errno = EINVAL;
 		return (-1);