general UI improvements

diff --git a/diff-delta.c b/diff-delta.c
index e49643353bf56807b3d4ac4011784b5d8dd6f7a4..77fea08dfb04d3a6ec12e11dbd321084d9028722 100644 (file)
--- a/diff-delta.c
+++ b/diff-delta.c
@@ -326,6 +326,8 @@ create_delta(const struct delta_index *index,
        const unsigned char *ref_data, *ref_top, *data, *top;
        unsigned char *out;
 
+       *delta_size = 0;
+
        if (!trg_buf || !trg_size)
                return NULL;