Log Message:
-----------
Fix make_tuple_from_row to support nested rowtypes, per gripe from
Roman Neuhauser. Update some obsolete comments for exec_eval_datum, too.
Modified Files:
--------------
pgsql/src/pl/plpgsql/src:
pl_exec.c (r1.151 -> r1.152)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/pl_exec.c.diff?r1=1.151&r2=1.152)