Log Message:
-----------
Avoid mathematical inconsistency in example about avoiding division by
zero with a CASE expression. Per gripe from Russell Smith.
Modified Files:
--------------
pgsql/doc/src/sgml:
syntax.sgml (r1.120 -> r1.121)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/syntax.sgml?r1=1.120&r2=1.121)