Log Message:
-----------
Fix recent breakage of decl_cursor_arglist syntax, per Michael Paesold.
Modified Files:
--------------
pgsql/src/pl/plpgsql/src:
gram.y (r1.80 -> r1.81)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/gram.y.diff?r1=1.80&r2=1.81)