Change assert to error

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@3837 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishtest/vtc_varnish.c

@@ -424,6 +424,8 @@ varnish_vclbackend(struct varnish *v, const char *vcl)
 	AZ(vsb_overflowed(vsb));
 
 	u = varnish_ask_cli(v, vsb_data(vsb), NULL);
+	if (u != CLIS_OK)
+		vtc_log(v->vl, 0, "FAIL VCL does not compile");
 	assert(u == CLIS_OK);
 	vsb_clear(vsb);
 	vsb_printf(vsb, "vcl.use vcl%d", v->vcl_nbr);