Minor cleanup in schema module. Thanks to schickb for the patch.
Minor cleanup in schema module. Thanks to schickb for the patch.

git-svn-id: 1a6133524cf556115cafdd509b8ccdbd83ff0695@75 7a298fb0-333a-0410-83e7-658617cd9cf3

kocolosk/couchdb-python,ligthyear/couchdb-python