Log Message:
-----------
Support functions for index opclasses should be immutable.
Found by running opr_sanity on contrib modules.
Modified Files:
--------------
pgsql/contrib/ltree:
ltree.sql.in (r1.13 -> r1.14)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/ltree/ltree.sql.in?r1=1.13&r2=1.14)