[PATCH v2 38/42] dir: use the_hash_algo for empty blob object ID

["brian m. carlson" <sandals@xxxxxxxxxxxxxxxxxxxx>]

To ensure that we are hash algorithm agnostic, use the_hash_algo to look
up the object ID for the empty blob instead of using the empty_tree_oid
variable.

Signed-off-by: brian m. carlson <sandals@xxxxxxxxxxxxxxxxxxxx>
---
 dir.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dir.c b/dir.c
index 06f4c4a8bf..e879c34c2e 100644
--- a/dir.c
+++ b/dir.c
@@ -828,7 +828,7 @@ static int add_excludes(const char *fname, const char *base, int baselen,
 		if (size == 0) {
 			if (oid_stat) {
 				fill_stat_data(&oid_stat->stat, &st);
-				oidcpy(&oid_stat->oid, &empty_blob_oid);
+				oidcpy(&oid_stat->oid, the_hash_algo->empty_blob);
 				oid_stat->valid = 1;
 			}
 			close(fd);