[PATCH v2 11/42] tree-walk: avoid hard-coded 20 constant

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

Use the_hash_algo to look up the length of our current hash instead of
hard-coding the value 20.

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

diff --git a/tree-walk.c b/tree-walk.c
index e11b3063af..27797c5406 100644
--- a/tree-walk.c
+++ b/tree-walk.c
@@ -105,7 +105,7 @@ static void entry_extract(struct tree_desc *t, struct name_entry *a)
 static int update_tree_entry_internal(struct tree_desc *desc, struct strbuf *err)
 {
 	const void *buf = desc->buffer;
-	const unsigned char *end = desc->entry.oid->hash + 20;
+	const unsigned char *end = desc->entry.oid->hash + the_hash_algo->rawsz;
 	unsigned long size = desc->size;
 	unsigned long len = end - (const unsigned char *)buf;