Re: [PATCH 1/3] notes: move hex_to_bytes() to hex.c and export it

Make the function for converting pairs of hexadecimal digits to binary
available to other call sites.

Signed-off-by: Rene Scharfe <redacted>
---
 cache.h |  7 +++++++
 hex.c   | 12 ++++++++++++
 notes.c | 17 -----------------
 3 files changed, 19 insertions(+), 17 deletions(-)

diff --git a/cache.h b/cache.h
index 6440e2bf21..f06bfbaf32 100644
--- a/cache.h
+++ b/cache.h

@@ -1317,6 +1317,13 @@ extern int set_disambiguate_hint_config(const char *var, const char *value);
 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 extern int get_oid_hex(const char *hex, struct object_id *sha1);
 
+/*
+ * Read `len` pairs of hexadecimal digits from `hex` and write the
+ * values to `binary` as `len` bytes. Return 0 on success, or -1 if