*: use array_size() helper macro

Use the array_size() helper macro.  Replaces several instances of local
macros with the same definition.

Reviewed-by: Scott Feldman <sfeldma@cumulusnetworks.com>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
diff --git a/tests/test-sig.c b/tests/test-sig.c
index 63aab6f..fe428de 100644
--- a/tests/test-sig.c
+++ b/tests/test-sig.c
@@ -43,7 +43,7 @@
 main (void)
 {
   master = thread_master_create ();
-  signal_init (master, Q_SIGC(sigs), sigs);
+  signal_init (master, array_size(sigs), sigs);
   
   zlog_default = openzlog("testsig", ZLOG_NONE,
                           LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);