From d74111450044ddd19567a79cabb5bda1d0768b5a Mon Sep 17 00:00:00 2001
From: Steffen Vogel <post@steffenvogel.de>
Date: Sat, 12 Jan 2019 13:49:27 +0100
Subject: [PATCH] path: fix bug causing missing data for some formats (e.g.
 JSON)

---
 lib/path.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/path.c b/lib/path.c
index 40dafbb32..82dba2b3a 100644
--- a/lib/path.c
+++ b/lib/path.c
@@ -744,7 +744,7 @@ int path_start(struct path *p)
 	p->last_sample->length = vlist_length(&p->signals);
 	p->last_sample->signals = &p->signals;
 	p->last_sample->sequence = 0;
-	p->last_sample->flags = 0;
+	p->last_sample->flags = p->last_sample->length > 0 ? SAMPLE_HAS_DATA : 0;
 
 	for (size_t i = 0; i < p->last_sample->length; i++) {
 		struct signal *sig = (struct signal *) vlist_at(p->last_sample->signals, i);