pgsql: Fix datatype confusion in logtape.c's right_offset().

Fix datatype confusion in logtape.c's right_offset().

This could only matter if (a) long is wider than int, and (b) the heap
of free blocks exceeds UINT_MAX entries, which seems pretty unlikely.
Still, it's a theoretical bug, so backpatch to v13 where the typo came
in (in commit c02fdc922).

In passing, also make swap_nodes() use consistent datatypes.

Ma Liangzhu

Discussion: https://postgr.es/m/17336-fc4e522d26a750fd@postgresql.org

Branch
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REL_13_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/0a5682041dbf991bd325a7d14daf39ecfc9bd624

Modified Files
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src/backend/utils/sort/logtape.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)