[tex-live] pretest: latexmp does not work anymore

[Daniel Oehry]

latexmp does not work correctly anymore. The following example exits
with an error:

input latexmp ;
beginfig(1);
  label(textext("test"),origin) ;
endfig;

end

This is MetaPost, version 1.203 (kpathsea version 5.0.0)
(./test.mp
(/usr/local/texlive/2009/texmf-dist/metapost/latexmp/latexmp.mp)
(./ltx-test.tmp
>> ltx-test.mp
>> ltx-test.mpx
! Unable to make mpx file.
l.7 latexmp_picture[1]:= btex
                              test etex ;
Transcript written on test.log.


I looked at this and found out that everything works as expected if I
change the name of the temporary-file in "latexmp.mp" at line 21 from

"ltx-" & jobname & ".tmp" ;

to 

"ltx-" & jobname & ".mp" ;

This seems very strange to me. Should this be changed in latexmp.mp or
is it an error in mpost?

Daniel