pad_file: propagate errno correctly

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/util.c b/util.c
index e1abae4..397b135 100644
--- a/util.c
+++ b/util.c
@@ -516,6 +516,7 @@ fill:
 		image->last_offset = lseek(outf, 0, SEEK_CUR) + size;
 		ret = ftruncate(outf, image->last_offset);
 		if (ret == -1) {
+			ret = -errno;
 			image_error(image, "ftruncate %s: %s\n", outfile, strerror(errno));
 			goto err_out;
 		}