#326 1.2.4b5 variable not defined bug in converters due to import change from 1.2.3

[Rui Da Costa]

there's a bug introduced in the betas for 1.2.4:
in converters.py L110 (in beta5):

hasattr(types, 'ObjectType')

results in global name 'types' is not defined

this does not work here as the import is:

from types import IntType, LongType ..., ObjectType, ...

but worked in 1.2.3 as it was just a simple: import types