Compatiblity: Fix, "isinstance" checks should check both types.
Compatiblity: Fix, "isinstance" checks should check both types.

* Some decorators implement their own method to react to instance
  check on e.g. function type, but then do not match for the
  compile function.

* With this, in case of failure, we also try compiled types.

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