Log Message:-----------Fix two typos, per report from Hashem Masoud.
Modified Files:-------------- pgsql/doc/src/sgml: xfunc.sgml (r1.98 -> r1.99) (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/xfunc.sgml.diff?r1=1.98&r2=1.99)
