pgsql-server/contrib/ltree ltree_op.c expected ...

CVSROOT: /cvsroot
Module name: pgsql-server
Changes by: teodor@svr1.postgresql.org 03/07/18 10:27:43

Modified files:
contrib/ltree : ltree_op.c
contrib/ltree/expected: ltree.out

Log message:
Fix subpath and subltree. Allow to return '' value.
subpath(ltree,0,0) returns ''.