make flexelint marginally happier

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@1036 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/varnishd.c

@@ -381,6 +381,7 @@ main(int argc, char *argv[])
 			p = strchr(optarg, '=');
 			if (p == NULL)
 				usage();
+			AN(p);
 			*p++ = '\0';
 			MCF_ParamSet(cli, optarg, p);
 			cli_check(cli);