r66677 introduces a reference leak in test_cprofile, as shown by
http://mail.python.org/pipermail/python-checkins/2008-September/074355.html

IMO, the code at the end of the function should not have been modified
this way. It is enough to do:

	if (PyErr_Occurred()) {
		PyErr_WriteUnraisable(pObj->externalTimer);
		return 0;
	}

it's the same "PyErr_WriteUnraisable" statement as 18 lines above, which
is valid because pObj->externalTimer is still a living python object
even if pObj is being cleared.