[Zope] Statistics and Missing.Value...

[Kent Polk]

When attempting to format Summary Statistics data with Missing.Value(s),
Missing.Value apparently has an incorrect type required for the
numeric format operations :

<!--
 Error type:  
 Error value: illegal argument type for built-in operation
 -->

 File /usr/pkg/zope/lib/python/Shared/Endicor/Tables/Mining.py,
    line 259, in summary_table_html
 File /usr/pkg/zope/lib/python/DocumentTemplate/DT_String.py,
    line 513, in __call__
    (Object: <string>)
 File /usr/pkg/zope/lib/python/DocumentTemplate/DT_In.py, 
    line 683, in renderwob
    (Object: data())
 File /usr/pkg/zope/lib/python/DocumentTemplate/DT_Var.py, 
    line 271, in render
    (Object: max-PNTR)
    (Info: ('max-PNTR', None, {'fmt': '%d', '': 'max-PNTR'}))
TypeError: (see above)

So my Summary Statistics method is expecting to format a numeric
value for 'max-PNTR' but it fails because the value isn't a number.

Any Suggestions?
Thanks