Fix, do not forward propagate class dictionaries with "del" statements.
Fix, do not forward propagate class dictionaries with "del" statements.

* Our temporary variables currently are never referenced when
  assigned, and these might changed that.

* This corrects at least Python2 jinja2 code.

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