[PATCH v4 18/27] refs.c: free the transaction before returning when number of updates is 0

We have to free the transaction before returning in the early check for
'return early if number of updates == 0' or else the following code would
create a memory leak with the transaction never being freed :
   t = ref_transaction_begin()
   ref_transaction_commit(t)

Signed-off-by: Ronnie Sahlberg <redacted>
---
 refs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/refs.c b/refs.c
index 563f336..c6ee43c 100644
--- a/refs.c
+++ b/refs.c

@@ -3451,8 +3451,10 @@ int ref_transaction_commit(struct ref_transaction *transaction,
 	int n = transaction->nr;
 	struct ref_update **updates = transaction->updates;
 
-	if (!n)
+	if (!n) {
+		ref_transaction_free(transaction);
 		return 0;
+	}
 
 	/* Allocate work space */
 	delnames = xmalloc(sizeof(*delnames) * n);

-- 
1.9.1.528.g98b8868.dirty