fixed output of numeric output from expr().

tests/testdb.jet

@@ -1,6 +1,6 @@
 #!../jet-2.0
 <jet cgi="true" name1="localname" filterblanklines="true" trimlines="true">
- <mysql host="localhost" database="barant" user="barant" password="uversa" sessionid="1">
+ <mysql host="barant.com" database="barant" user="barant" password="uversa" sessionid="1">
   <sql sessionid="1">select * from testdata</sql>
   <whilerow name="index" count="10" sessionid="1">
    $[1.id] $[1.text] $[1.value]