index_format %l

[Bob Self <bobself@xxxxxxxxxxx>]

I have %l in the index_format string (I'm just using the default).

I notice that mosts messages have (   0) as the number of lines, but now
and then one will have a non-zero number. The ones that show zero actually
have many lines of text. How can I get the to show non-zero numbers?

thanks,
Bob