#define SZ_FMT PRIuMAX
static inline uintmax_t sz_fmt(size_t s) { return s; }
-const unsigned char null_sha1[20];
+const unsigned char null_sha1[GIT_MAX_RAWSZ];
const struct object_id null_oid;
const struct object_id empty_tree_oid = {
EMPTY_TREE_SHA1_BIN_LITERAL