[R] Line length in legend

[Sven Garbade]

Hi all,

is it posible to alter the length of the lines in the legend() function?

I think they are a little bit to short, so I changed the default value
of seg.len from 2 to 6. But maybe it would be nice to have an argument,
so users can change the default computed line length as they like. 

Sven