Log Message:
-----------
fix edge-case bugs with empty arrays and nulls
Modified Files:
--------------
hstore-new:
hstore_io.c (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/hstore-new/hstore-new/hstore_io.c?r1=1.4&r2=1.5)
hstore-new/sql:
hstore.sql (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/hstore-new/hstore-new/sql/hstore.sql?r1=1.2&r2=1.3)