Properly document that NEW is unassigned in plpgsql for DELETE (not
NULL), and OLD is unassigned for INSERT, and NEW/OLD are unassigned (not
NULL) for statement-level triggers.

Per report from Pavel Stehule

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/0729271adf9145900f59ec7a2053695bd551f4b1

Modified Files
--------------
doc/src/sgml/plpgsql.sgml |    4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)

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