Python3.4: Fix corruption of generator reference counts during "finalize".
Python3.4: Fix corruption of generator reference counts during "finalize".

* The finalize can expect the object to be reference counted, and to
  have no need to resurrect it.

* Not sure how widespread this was. Found by running CPython3.3 tests
  with 3.4 triggering assertion.

kayhayen/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka