Try min, max or sum function.
min() -> returns number but should encounter an error, you simply cannot get
minimum of nothing, same with max and similar with sum.
I recommedn you to create constraint on minimum parameter count. For example
like in my fix.
Original issue reported on code.google.com by Rotter.M...@gmail.com on 29 Jan 2013 at 6:56
Original issue reported on code.google.com by
Rotter.M...@gmail.com
on 29 Jan 2013 at 6:56Attachments: