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8eb5340be9
Prep for dropping the cast_size_t_to_ulong() shim in add_preferred_base() (pack-objects.c), and aligns the public API with the size_t shape the rest of the tree topic is moving toward. struct tree_desc.size stays unsigned int -- the on-disk tree format hard-caps each tree at 4 GiB, so the field is intentionally narrow and the assignment in init_tree_desc_internal() already truncated unsigned long inputs the same way it now truncates size_t inputs. The widening is purely about the call-side type-correctness; the internal cap is unchanged. All 30+ callers pass values that promote cleanly (unsigned long, size_t, or smaller integer types). Assisted-by: Opus 4.7 Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>