From 2325b391a2193d7729a9cb188b66e08588484cce Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Thu, 25 Apr 2024 14:33:01 +0200
Subject: indexamajig: Avoid writing empty Mille records

Fixes: https://github.com/taw10/crystfel/issues/9
---
 libcrystfel/src/crystfel-mille.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libcrystfel/src/crystfel-mille.c b/libcrystfel/src/crystfel-mille.c
index 3d02e527..72f89425 100644
--- a/libcrystfel/src/crystfel-mille.c
+++ b/libcrystfel/src/crystfel-mille.c
@@ -327,6 +327,9 @@ void crystfel_mille_write_record(Mille *m)
 	int ni = 0;
 	int nw = (m->n * 2)+2;
 
+	/* Don't write empty records */
+	if ( m->n == 0 ) return;
+
 	fwrite(&nw, sizeof(int), 1, m->fh);
 
 	fwrite(&nf, sizeof(float), 1, m->fh);
-- 
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