send-pack: release strbuf on error return in send_pack()

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

send-pack.c

@@ -492,8 +492,11 @@ int send_pack(struct send_pack_args *args,
 			 * we were to send it and we're trying to send the refs
 			 * atomically, abort the whole operation.
 			 */
-			if (use_atomic)
+			if (use_atomic) {
+				strbuf_release(&req_buf);
+				strbuf_release(&cap_buf);
 				return atomic_push_failure(args, remote_refs, ref);
+			}
 			/* Fallthrough for non atomic case. */
 		default:
 			continue;