[master] 24441d0 Actually use the configured VUT error callback

[Dridi Boukelmoune]

commit 24441d04ec51096a78d7e40e77f75c08a7d472bb
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Thu Sep 14 01:23:03 2017 +0200

    Actually use the configured VUT error callback

diff --git a/lib/libvarnishapi/vut.c b/lib/libvarnishapi/vut.c
index 9845470..1438195 100644
--- a/lib/libvarnishapi/vut.c
+++ b/lib/libvarnishapi/vut.c
@@ -118,9 +118,12 @@ VUT_Error(struct VUT *vut, int status, const char *fmt, ...)
 {
 	va_list ap;
 
-	assert(status != 0);
+	CHECK_OBJ_NOTNULL(vut, VUT_MAGIC);
+	AN(vut->error_f);
+	AN(status);
+
 	va_start(ap, fmt);
-	vut_error(vut, status, fmt, ap);
+	vut->error_f(vut, status, fmt, ap);
 	va_end(ap);
 }