[pstricks] A bug in \psCircleTangents

[Donut E. Knot]

I think there is a bug in \psCircleTangents.
The tangent points seem to be wrongly placed.

\documentclass[pstricks,border=12pt,12pt]{standalone}
\usepackage{pstricks-add}
\begin{document}
\begin{pspicture}[showgrid](8,6)
\pnodes(5,4){O}(3,1){A}(7,1){B}
\pscircle(O){1}
\psCircleTangents(A)(O){1}
\psline(A)(CircleT1)
\psline(A)(CircleT2)
\end{pspicture}
\end{document}

Thank you in advance.

Stiff Jokes
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