Add regression test to see if the min/max values of int8 convert correctly.

Tom Lane <tgl@sss.pgh.pa.us>

Commit: 81788719b9f24e58960665230c68bde36e098e03
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2005-12-05T04:14:07Z
Releases: 8.0.5
Add regression test to see if the min/max values of int8 convert correctly.

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