Log Message:
-----------
bugfix handling of null values for toast tables
Modified Files:
--------------
pgstatspack/sql:
pgstatspack_create_snap.sql (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatspack/pgstatspack/sql/pgstatspack_create_snap.sql?r1=1.8&r2=1.9)