nfs: Fix memory leak in nfs_file_create()

The leak was introduced in commit 94d6a7a7.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>

block/nfs.c

@@ -676,6 +676,7 @@ static int nfs_file_create(const char *url, QemuOpts *opts, Error **errp)
     ret = nfs_ftruncate(client->context, client->fh, total_size);
     nfs_client_close(client);
 out:
+    QDECREF(options);
     g_free(client);
     return ret;
 }