compare class in the given path with our own class using issubclass, since paths  are always against the base class
compare class in the given path with our own class using issubclass, since paths 
are always against the base class


git-svn-id: 655ff90ec95d1eeadb1ee4bb9db742a3c015d499@6629 8cd8332f-0806-0410-a4b6-96f4b9520244

obeattie/sqlalchemy,obeattie/sqlalchemy,obeattie/sqlalchemy