Fixed a bug which prevented correct compilation of intbitset with Python-2.4 and Cython due to Py_ssize_t wrong definition (spotted by Nick).
Fixed a bug which prevented correct compilation of intbitset with Python-2.4
and Cython due to Py_ssize_t wrong definition (spotted by Nick).

inveniosoftware/invenio,inveniosoftware/invenio,tiborsimko/invenio,tiborsimko/invenio