Add CHECK_FOR_INTERRUPTS() in various strategic spots, per comments

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

Commit: 3b6cbce458d80176250af38b225541f53d5cad8e
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2002-01-06T00:37:44Z
Releases: 7.2.1
Add CHECK_FOR_INTERRUPTS() in various strategic spots, per comments
from Hiroshi.

Files