unwanted comma with jureco and <at>article

Hi,

When there is no volume given for an <at> article (not a required field)
there are two commas (unwanted) between journal and number. This seems
to happen
only at articles with jureco. Tested with version 0.6 and 0.61.
Example output:
Abaza, Mona (2001): Konsumkultur und Armut in Aegypten. INAMO,, Nr.
26, 24-25
instead of:
Abaza, Mona (2001): Konsumkultur und Armut in Aegypten. INAMO, Nr. 26,
24-25

thanks for help, Gregor Hyneck

minimal example below:

-------------------
kalimat.tex
-------------------

\documentclass{book}
\usepackage [ngerman] {babel}
\usepackage[latin1]{inputenc}=20=20=20=20=20
\usepackage {jurabib, a4}

\begin{document}

\cite{Abaza2001}=20=20

\bibliographystyle{jureco}
\bibliography{disslit}=09
\end{document}


-------------------
disslit.bib
-------------------

@ARTICLE{Abaza2001,
  author =3D {Abaza, Mona},
  title =3D {Konsumkultur und Armut in Aegypten},
  journal =3D {INAMO},
  year =3D {2001},
  pages =3D {24-25},
  number =3D {26},
}





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