convert trivial cases to FLEX_ARRAY macros

Using FLEX_ARRAY macros reduces the amount of manual
computation size we have to do. It also ensures we don't
overflow size_t, and it makes sure we write the same number
of bytes that we allocated.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/hashmap.c b/hashmap.c
index f693839cb4..b10b642229 100644
--- a/hashmap.c
+++ b/hashmap.c
@@ -256,10 +256,9 @@ const void *memintern(const void *data, size_t len)
 	e = hashmap_get(&map, &key, data);
 	if (!e) {
 		/* not found: create it */
-		e = xmallocz(sizeof(struct pool_entry) + len);
+		FLEX_ALLOC_MEM(e, data, data, len);
 		hashmap_entry_init(e, key.ent.hash);
 		e->len = len;
-		memcpy(e->data, data, len);
 		hashmap_add(&map, e);
 	}
 	return e->data;