block/crypto: Fix memory leak in create error path

Fixes: Coverity CID 1393782
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

block/crypto.c

@@ -551,7 +551,7 @@ static int coroutine_fn block_crypto_co_create_opts_luks(const char *filename,
     /* Create protocol layer */
     ret = bdrv_create_file(filename, opts, errp);
     if (ret < 0) {
-        return ret;
+        goto fail;
     }
 
     bs = bdrv_open(filename, NULL, NULL,