Re: [PATCH 2/8] move prune_cache() to git lib

Nguyễn Thái Ngọc Duy  [off-list ref] writes:

+#define prune_cache(prefix, prefix_len) prune_index((prefix), (prefix_len), &the_index);
...
+extern void prune_index(const char *prefix, int prefix_len, struct index_state *istate);

Please make *istate the first parameter to be consistent with other
distim_cache() wrappers for distim_index().