commit 9c659ea03e148f73684817fbc7104feb365ee820
from: Stefan Sperling <stsp@stsp.name>
date: Sun Nov 22 13:25:32 2020 UTC

do not forget to add an offset for line zero in diff_blobs()

Fixes a problem in 'tog diff' where the first line of the output was cut off.

commit - 22c0f09da0674b6b6122c7de371a1e35ade2e351
commit + 9c659ea03e148f73684817fbc7104feb365ee820
blob - 28c604682a56fc5aabb094bd91193ddebda81043
blob + ab9338f610ccb3d2aac14b126d7201e501f48cb3
--- lib/diff.c
+++ lib/diff.c
@@ -71,6 +71,11 @@ diff_blobs(off_t **line_offsets, size_t *nlines,
 
 	if (line_offsets && *line_offsets && *nlines > 0)
 		outoff = (*line_offsets)[*nlines - 1];
+	else if (line_offsets) {
+		err = add_line_offset(line_offsets, nlines, 0);
+		if (err)
+			goto done;
+	}
 
 	if (resultp)
 		*resultp = NULL;