Compilation error after texlive update

I used to make animated pictures using pstricks and the beamer overlay syntax (eg. using only<2>{<some pstricks code>}) with the standalone class.

Here a MWE which did the work:

documentclass[beamer,pstricks,preview=true]{standalone}

standaloneenv{{pspicture}}

psset{unit=2cm}
begin{document}
begin{standaloneframe}
  begin{pspicture}[showgrid=bottom](-5,-5)(5,5)
    psdot(0,0)
    only<2>{psdot(1,1)}
  end{pspicture}
end{standaloneframe}
end{document}

This MWE does compile with texlive2013 (iso-version) with latex -> dvips -> ps2pdf: a pdf with two pages and just the pspictures environment correctly croped. HOWEVER it does not compile with a fully updated texlive2013 distribution, the conversion from ps to pdf fails with the following message:

Error: /typecheck in --div--
Operand stack:

   1   1   0.0   0.0   a   65781.8

Execution stack:

   %interp_exit   .runexec2   --nostringval--   --nostringval--   
--nostringval--   2   %stopped_push   --nostringval--   --nostringval--   
--nostringval--   false   1   %stopped_push   1910   1   3   %oparray_pop   
1909   1   3   %oparray_pop   1893   1   3   %oparray_pop   1787   1   3   
%oparray_pop   --nostringval--   %errorexec_pop   .runexec2   
--nostringval--   --nostringval--   --nostringval--   2   %stopped_push   
--nostringval--   --nostringval--   --nostringval--   --nostringval--   4   
--nostringval--   %repeat_continue   --nostringval--

Dictionary stack:

   --dict:1168/1684(ro)(G)--   --dict:0/20(G)--   --dict:127/200(L)--   
--dict:173/300(L)--

Current allocation mode is local

Last OS error: 2

Current file position is 101382

GPL Ghostscript 9.05: Unrecoverable error, exit code 1

This code does compile by removing the preview package but the result is not what is expected. I also tried to active preview with the option of the standalone package but this is also without effect.

Does someone know how to resolve this problem, or how to modify the MWE so that it compiles and give the right output ?

documentclass[beamer,pstricks,preview=false]{standalone}

geometry{paperheight=20cm,paperwidth=20cm,left=0cm,right=0cm,bottom=0cm,top=0cm}

psset{unit=2cm}
begin{document}
begin{standaloneframe}%
  begin{pspicture}[showgrid=bottom](-5,-5)(5,5)
    psdot(0,0)
    only<2>{psdot(1,1)}
  end{pspicture}%
end{standaloneframe}
end{document}