Ensure that unsigned 4-byte OIDs are able to squeeze into the signed 4-byte int accepted by the two-argument form of pg_try_advisory_lock() we are using.
Ensure that unsigned 4-byte OIDs are able to squeeze into the signed
4-byte int accepted by the two-argument form of pg_try_advisory_lock()
we are using.

Fixes #30. Thanks to Mark Steben and Greg Sabino Mullane for the report
and diagnosis.

mr-mustash/pg_repack,bwtakacy/pg_repack,reorg/pg_repack,reorg/pg_repack