[pstricks] \psChiIIDist problem with fillstyle=solid

[mathias legrand]

hello all,

when I use what follows:

\psChiIIDist[linewidth=0.5pt,linecolor=black,nue=2,fillstyle=solid,fillcolor=blue]{0.1}{9}

the fill color is uncorrectly placed (meaning over the curve). I know 
that it is because the process
of filling joins the two end points (\Xi(0) and \Xi(end)) which provides 
unwanted results sometimes.
Is there an easy trick to avoid that? I know how to fix it by defining 
\Xi numerically with its first value=0
but there is another strategy?

Thank you