build: make code "-Wpointer-arith" clean

Recently introduced resolve_undo_read() expected arithmetic to (void *)
to work on byte-addresses.  Correct this.

Noticed by Brandon Casey.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/resolve-undo.c b/resolve-undo.c
index 37d73cd949..0f50ee0484 100644
--- a/resolve-undo.c
+++ b/resolve-undo.c
@@ -53,7 +53,7 @@ void resolve_undo_write(struct strbuf *sb, struct string_list *resolve_undo)
 	for_each_string_list(write_one, resolve_undo, sb);
 }
 
-struct string_list *resolve_undo_read(void *data, unsigned long size)
+struct string_list *resolve_undo_read(const char *data, unsigned long size)
 {
 	struct string_list *resolve_undo;
 	size_t len;
@@ -93,7 +93,7 @@ struct string_list *resolve_undo_read(void *data, unsigned long size)
 				continue;
 			if (size < 20)
 				goto error;
-			hashcpy(ui->sha1[i], data);
+			hashcpy(ui->sha1[i], (const unsigned char *)data);
 			size -= 20;
 			data += 20;
 		}