pgsql-server: For a SQL function declared to return a named composite

Log Message:
-----------
For a SQL function declared to return a named composite type, make
sure the tuple datums it returns actually show that type and not RECORD.

Modified Files:
--------------
pgsql-server/src/backend/executor:
functions.c (r1.82 -> r1.83)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/executor/functions.c.diff?r1=1.82&r2=1.83)