Initialize all bits in the sigaction.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@1699 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/mgt_child.c

@@ -410,6 +410,7 @@ mgt_run(int dflag, const char *T_arg)
 
 	setproctitle("Varnish-Mgr %s", heritage.name);
 
+	memset(&sac, 0, sizeof sac);
 	sac.sa_handler = SIG_IGN;
 	sac.sa_flags = SA_RESTART;