Log Message:
-----------
Fix problems with certain shells (e.g., FreeBSD, Cygwin) clearing the
exit status in multiline traps.
Modified Files:
--------------
pgsql/src/test/regress:
pg_regress.sh (r1.50 -> r1.51)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/pg_regress.sh.diff?r1=1.50&r2=1.51)