Re: [PATCH v2 06/14] commit-graph: implement git-commit-graph --read

[Stefan Beller <sbeller@xxxxxxxxxx>]

> +static void free_commit_graph(struct commit_graph **g)
> +{
> +       if (!g || !*g)
> +               return;
> +
> +       close_commit_graph(*g);
> +
> +       free(*g);
> +       *g = NULL;

nit: You may want to use FREE_AND_NULL(*g) instead.