Log Message:
-----------
Fix core dump in contrib/xml2's xpath_table() when the input query returns
a NULL value. Per bug #4058.
Tags:
----
REL8_1_STABLE
Modified Files:
--------------
pgsql/contrib/xml2:
xpath.c (r1.8 -> r1.8.2.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/xml2/xpath.c?r1=1.8&r2=1.8.2.1)