debinstall #24325 when remove a distribution ldi crashes on old incoming folders [validation pending]

For example, after having removed "hardy" from the conf files I get

ldi publish myrepo
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/usr/lib/pymodules/python2.5/debinstall/ldi.py", line 64, in run
  runfunc(options, args, parser)
File "/usr/lib/pymodules/python2.5/debinstall/command.py", line 54, in run
  self.process()
File "/usr/lib/pymodules/python2.5/debinstall/ldi.py", line 348, in process
  destdir = self._check_repository(repository, "dists", distrib)
File "/usr/lib/pymodules/python2.5/debinstall/ldi.py", line 167, in _check_repository
  "check" % (repository, distrib))
debinstall.exceptions.DistributionError: logilab-private: distribution 'hardy' not found. Use ldi list to check

This should be ignored and maybe add a warning for the user to clean up the directory.