[master] bd4794e Remember to reset error buffer.

[Poul-Henning Kamp]

commit bd4794e60bd80a5b99d51db3834baaf3034eb20f
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Thu Jun 29 04:39:52 2017 +0000

    Remember to reset error buffer.

diff --git a/lib/libvarnishapi/vsm.c b/lib/libvarnishapi/vsm.c
index e43bd9d..9261645 100644
--- a/lib/libvarnishapi/vsm.c
+++ b/lib/libvarnishapi/vsm.c
@@ -215,6 +215,7 @@ VSM_Start(struct vsm *vd, double patience, int progress)
 	AN(vd->dname);
 	t0 = VTIM_mono();
 	while (1) {
+		VSM_ResetError(vd);
 		i = VSM_Open(vd);
 		if (patience <= 0. || i == 0) {
 			if (progress >= 0 && n > 4)