convert-ly fails on 2.11.40

[Graham Percival]

Using GUB, on OSX, but I haven't changed my setup ("Notes for OSX on
the command-line") since .39.


tsubasa:~/tmp gperciva$ convert-ly -e foo.ly 
convert-ly (GNU LilyPond) 2.11.40
Processing `foo.ly'... 
Traceback (most recent call last):
  File
"/Users/gperciva/Apps/LilyPond.app/Contents/Resources/bin/convert-ly",
line 307, in ? main () File
"/Users/gperciva/Apps/LilyPond.app/Contents/Resources/bin/convert-ly",
line 301, in main do_one_file (f) File
"/Users/gperciva/Apps/LilyPond.app/Contents/Resources/bin/convert-ly",
line 234, in do_one_file (last, result) = do_conversion (infile.read
(), from_version, to_version) File
"/Users/gperciva/Apps/LilyPond.app/Contents/Resources/bin/convert-ly",
line 171, in do_conversion if convertrules.error_file: AttributeError:
'module' object has no attribute 'error_file' tsubasa:~/tmp gperciva$